JP4810903B2 - Turning tools and high feed inserts - Google Patents

Description

The present invention relates to a turning tool such as a face mill and an end mill and a tip used therefor, and more particularly to a turning tool capable of mounting a tip having a different cutting edge shape and the tip.

FIGS. 13 to 16 show a rolling tool that can be mounted with chips having different cutting edge shapes. The rolling tool shown in FIGS. 13 to 15 selectively attaches a positive regular octagonal tip 5 and a circular tip 22 to the same tip seat 33. That is, the lower surface 25 of the circular tip 22 is a regular octagon having the same dimensions as the regular octagonal tip 5, and a substantially chevron-shaped planar reference side surface 27 is provided from each side toward the cutting edge 24 of the upper surface 23. The reference side surface 27 has the same angle as the side surface 9 of the regular octagonal chip 5. The lower surfaces 8 and 25 of the chips 5 and 22 are seated on the bottom surface 34 of the chip seat 33, the protrusions 36 are fitted into the recesses 10 b and 31 b of the chip holes 10 and 31, and the side surfaces 9 and The reference side surface 27 is abutted and screwed (for example, see Patent Document 1).

The cutting tool 10 illustrated in FIGS. 16 and 17 includes a tool body 12 having at least one tip seat 14 and at least two tips 16, 18, 20 that are interchangeably received in the tip seat 14. , 22. The chip seat 14 has a first lateral support wall surface 26 that forms an angle θ with the second lateral support wall surfaces 28, 30 when measured in a plane perpendicular to the axis of the chip seat 14. Each of the tips 16, 18, 20, 22 is shaped to provide a plurality of hitting features that are appropriately angled for positioning against the lateral support surfaces 26, 28, 30. It has a surrounding flank surface 42. The peripheral flank surface 42 of one tip is further shaped to provide at least two cutting points having a first nose angle, and the peripheral flank surface 42 of the other tip further includes a first It is configured to provide at least two cutting points having a second nose angle different from the nose angle (see, for example, Patent Document 2).

These conventional turning tools and cutting tools are capable of mounting two or more types of chips having different rake face shapes on one tool body.

JP-A-9-290306 Japanese translation of PCT publication No. 2002-506738

However, although the above-mentioned conventional rolling tool and cutting tool can be equipped with two or more types of chips having different usage conditions such as cutting conditions and applicable work materials, the side wall of the chip seat for positioning and supporting these chips In (support wall surface), it was difficult to ensure a large area. For this reason, when high feed processing is performed, the side wall (support wall surface) of the chip seat cannot withstand the cutting resistance acting through the chip, and is plastically deformed, which may deteriorate the positioning accuracy of the chip.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its purpose is to make it possible to selectively mount a general-purpose tip and a high-feed tip having different feed application conditions, and with good tip positioning accuracy. The object is to provide a tool and a high-feed tip to be attached to the tool.

In order to solve the above-mentioned problems, the present invention provides a substantially polygonal plate shape in one or a plurality of chip seats formed in the outer periphery of the tip end of a substantially cylindrical tool body, and a seating surface. In a rolling tool in which a chip having an upper surface facing the rake face and a chip having at least one main cutting edge formed on a side ridge portion of the upper surface is mounted, the chip seat has a general-purpose chip, At least one type of high-feed tip having a shape of the main cutting edge different from that of the general-purpose tip can be mounted. Each of the general-purpose tip and the high-feed tip has a seating surface of the tip seat. Abutting on the seating surface, at least one reference side surface abuts on a support wall surface rising from the seating surface of the tip seat, and is mounted on the tip seat, and the width L1 of the reference side surface of the general-purpose tip and the high feed Chip standard The relationship with the surface width L2 is 0.5L1 ≦ L2 ≦ 0.9L1, and the approach angle δ1 of the main cutting edge of the general-purpose tip in the rolling tool and the main cutting of the high-feed tip The rolling tool is characterized in that the relationship with the approach angle δ2 of the blade is δ1 <δ2. The above-mentioned general-purpose tip is a tip having a versatility that can be applied from a low depth of cut to a deep depth of cut, which has a larger cutting limit value than a high feed tip, and specifically, when mounted on a rolling tool. An approach angle in the range of 15 ° to 45 °. On the other hand, the high-feed tip is smaller than the general-purpose insert, but is capable of high feed and has high cutting performance at high feed. Specifically, it is mounted on a rolling tool. In this case, the approach angle is larger than that of the general-purpose chip.

In the high feed tip of the present invention, the seating surface that contacts the seat surface of the chip seat and the reference side surface that contacts the support wall surface of the chip seat are formed in the same plane as the seating surface and the reference side surface of the general-purpose chip. It is characterized by being.

According to the turning tool of the present invention, a general-purpose tip and a high-feed tip capable of higher feed processing than the general-purpose tip can be selectively mounted, so a tool body is prepared for each tip. It is unnecessary and economical, and by mounting the high-feed tip, it is possible to perform processing more efficiently than when a general-purpose tip is mounted. Both the general-purpose tip and the high-feed tip of the present invention can be mounted on one tool body because the seating surface and the reference side surface are formed in the same plane.

According to the milling tool of the present invention, the width L2 of the reference side surface of the high-feed tip is in the range of 50% to 90% of the width L1 of the reference side surface of the general-purpose tip. The high-feeding tip supported by is firmly positioned without being moved in the tip seat even during high-feed machining. Further, since the support wall surface of the chip seat is not easily deformed and damaged, the positioning accuracy of the high-feed chip and the general-purpose chip can be maintained for a long time. If the width of the reference side surface of the high-feed tip is less than 50% of the width of the reference side surface of the general-purpose tip, the positioning accuracy of the high-feed tip may deteriorate or the support wall surface of the tip seat may be deformed or damaged. If it exceeds 90%, the shape of the main cutting edge of the high feed tip may be restricted. The width of the reference side surface is the maximum value of the width measured in the direction parallel to the seating surface of the chip in the region in contact with the support wall surface of the chip seat.

The approach angle in the turning tool of the present invention is larger for the high-feed tip than for the general-purpose tip. Therefore, in comparison with the general-purpose tip, the high-feed tip has a smaller net cutting thickness in the normal direction of the main cutting edge and a smaller load on the main cutting edge, and in addition to the back component force in the cutting resistance. Since the ratio increases and the direction of the cutting force approaches the tool axis direction, the tool chatter is suppressed, so that high feed processing is possible. The high feed machining is realized by mounting high feed tips on all the chip seats of the cutting tool. The approach angle δ2 of the turning tool equipped with the high feed tip is preferably in the range of 50 ° to 75 °. This is because if the angle is less than 50 °, damage to the main cutting edge and tool chatter are likely to occur during high-feed machining, and if it exceeds 75 °, the cutting limit value is too small and the practicality becomes low. is there.

The seat surface and support wall surface of the tip seat provided on the tool body of the rolling tool can be brought into contact with the seating surface and the reference side surface provided on the general-purpose tip and the high-feed tip, respectively. The high feed tip can be selectively mounted on one tool body.

In the high feed tip of the present invention, the shape of the main cutting edge formed on the side ridge portion of the upper surface is different from the shape of the main cutting edge of the general-purpose tip in a plan view seen from the thickness direction of the tip. When the cutting tool of the present invention is mounted, the approach angle δ2 is in the range of 50 ° to 75 °, which is larger than the approach angle δ1 when the general-purpose tip is mounted on the cutting tool. Therefore, as described above, the load on the main cutting edge is reduced and tool chatter is suppressed, so that high feed processing is possible.

In the high feed tip, the length of the main cutting edge is in the range of 3 mm to 5 mm. This is to suppress tool chatter due to an increase in cutting resistance. If the length of the main cutting edge is less than 3 mm, the cutting limit value is too small and the utility may be lost, and if it exceeds 5 mm, the cutting resistance may increase and tool chatter may occur. Furthermore, the high feed tip has a secondary cutting edge for finishing the machining surface, and the length of the secondary cutting edge is in the range of 1 mm to 3 mm. Is good. If the length of this sub cutting edge is less than 1 mm, the surface roughness of the machined surface may deteriorate at high feed rates. If it exceeds 3 mm, the length of the cutting edge in contact with the work material becomes long, and the turning tool In addition, chatter may occur in the work material.

The reference side surface of the high-feed tip is formed in a lower region of the flank extending from the side ridge portion of the upper surface, and is formed from a flat plane located inside the flank. Therefore, the width of the reference side surface of the high-feed tip can be secured in the range of 50% to 90% of the width of the reference side surface of the general-purpose chip.

FIGS. 1-9 is a figure which shows one Embodiment of the face milling which is a cutting tool equipped with the high feed tip and this chip | tip which applied this invention. FIG. 1 is a plan view of a high-feed tip as viewed from its thickness direction. FIG. 2 is a side view of the high-feed tip shown in FIG. FIG. 3 is a rear view of the high feed tip shown in FIG. FIG. 4 is an enlarged view of an end surface taken along line S1-S1 in FIG. FIG. 5 is a plan view of the general-purpose chip as seen from the thickness direction. FIG. 6 is a side view of the general-purpose chip shown in FIG. FIG. 7 is a rear view of the general-purpose chip shown in FIG. FIG. 8 is a front view of the face mill equipped with the high feed tip shown in FIG. FIG. 9 is a side view seen from a direction orthogonal to the axis of the face mill shown in FIG. FIG. 10 is a partial cross-sectional side view of the face mill shown in FIG. FIG. 11 is a side view seen from a direction orthogonal to the axial center of the face mill equipped with the general-purpose chip shown in FIG. 12 is a partial cross-sectional side view of the face mill shown in FIG.

First, in FIG. 5, the general-purpose chip 1 </ b> A has a substantially square plate shape, the upper surface of which is a rake surface 2, and the lower surface of the general-purpose chip 1 </ b> A extends in a direction perpendicular to the thickness direction of the chip 1 </ b> A. The side surface between the upper surface and the lower surface is a flank. A mounting hole 4 penetrating the upper and lower surfaces is formed in the approximate center of the upper surface. The mounting hole 4 is for inserting a clamp screw 109 for fixing the chip 1A to the chip seat 105. Sub-edges 5 are formed at four corners A, B, C, and D, respectively, on the edge of the upper surface that becomes the rake face 2, and the approach angle δ1 in the face mill 100 is in the range of 15 ° to 45 °. Therefore, the angle formed between the auxiliary cutting edge 5 and the main cutting edge 6 intersecting with the auxiliary cutting edge is an obtuse angle and is in the range of 105 ° to 135 °. The main cutting edge 6 is formed between two adjacent sub cutting edges 5. Further, a curved corner blade 7 that smoothly connects both the auxiliary cutting edge 5 and the main cutting edge 6 is formed.

6 and 7, the auxiliary cutting blade flank 15, the main cutting blade flank 16 and the corner blade flank 17 are formed on the side surfaces extending from the auxiliary cutting blade 5, the main cutting blade 6 and the corner blade 7, respectively. Yes. The main cutting edge flank 16 is formed on the main cutting edge first flank 16a formed on the main cutting edge 6 side and a lower region of the main cutting edge first flank 16a and intersects the seating surface 3. It is comprised from the main cutting blade 2nd flank 16b. The main cutting edge flank 16 has a positive clearance angle, but the main cutting edge second flank 16b has a larger clearance angle than the main cutting edge first flank 16a. . The main cutting edge second flank 16b adjacent to each other with one corner portion A, B, C, D interposed therebetween is a reference surface 16c that is in contact with and supported by the support wall surfaces 105b and 105c of the tip seat 105. The secondary cutting edge flank 16 and the corner blade flank 17 also have positive clearance angles.

On the other hand, in the plan view of FIG. 1 seen from the thickness direction of the chip, the high-feed chip 1B has a basic shape of a substantially square plate like the general-purpose chip 1A, and its upper surface is a rake face 2. At the same time, the lower surface is a seating surface 3 formed of a substantially flat plane perpendicular to the thickness direction of the chip 1B. The square surface of the upper surface of the high-feed chip 1B is formed so that the inscribed circle diameter is slightly larger than the square surface of the upper surface of the general-purpose chip 1A. Further, each of the corner portions A, B, C, and D of the square surface is formed with the auxiliary cutting edge 5, and the main cutting edge 6 adjacent to the auxiliary cutting edge 5 cuts out the side ridge portion of the square surface. The shape of the main cutting edge 6 of the general-purpose chip 1A is different. In order to set the approach angle δ2 in the face mill 100 to be in the range of 50 ° to 75 °, the angle formed by the main cutting edge 6 and the auxiliary cutting edge 5 is an obtuse angle and is in the range of 140 ° to 165 °. . An auxiliary cutting edge 8 is formed on the remaining portion of the side ridge cut out in the main cutting edge 6. A curved corner blade 7 that smoothly connects both the auxiliary cutting edge 5 and the main cutting edge 6 is formed. Similarly, a curved intersection that smoothly connects both the main cutting edge 6 and the auxiliary cutting edge 8 is formed.

2 and 3, the side surfaces extending from the secondary cutting edge 5, the main cutting edge 6 and the auxiliary cutting edge 8 to the seating surface 3 are respectively provided with the secondary cutting edge flank 15, the main cutting edge flank 16 and the auxiliary cutting edge relief. A surface 18a is formed. A reference side surface 18c extending to the seating surface 3 is formed in the lower region of the auxiliary cutting blade flank 18a via a curved portion 18b recessed inward of the tip. The reference side surface 18c is formed of a flat plane, and is disposed on the chip inner side of the plane extending from the auxiliary cutting blade relief surface 18a, so that a part thereof bites into the main cutting blade relief surface 16. Is formed. Two reference side surfaces 18c formed at adjacent corners and in a right angle relationship are abutted and supported by support wall surfaces 105b and 105c of the tip seat 105 provided on the tool body 101 of the face mill 100. Here, as can be understood from FIG. 4, the high-feed tip 1 </ b> B indicated by the solid line and the general-purpose tip indicated by the two-dot chain line are each seated in a cross section cut along a plane including the chip center axis P. The surface 3 and the reference side surfaces 18c and 16c are formed in the same plane. Therefore, both the general-purpose tip 1A and the high-feed tip 1B can be mounted on the tip seat 105 of one tool body 101 so that the positions of both tip central axes coincide.

In FIG. 4, the support wall surfaces 105b and 105c of the chip seat 105 indicated by two-dot chain lines are in surface contact with the reference side surfaces 16c and 18c of the chips 1A and 1B, or regions above the reference side surfaces 16c and 18c. The angle of inclination is the same as or slightly smaller than that of the reference side surfaces 16c and 18c. In the reference side surfaces 16c and 18c, the width in the direction parallel to the seating surface 3 in the region in contact with the support wall surfaces 105b and 105c is L1 for the general-purpose chip 1A and L2 for the high-feed chip 1B (see FIGS. 2 and 6). ), 0.5L1 ≦ L2 ≦ 0.9L1. When the support wall surfaces 105b and 105c of the chip seat 105 are in line contact with the reference side surfaces 16c and 18c, the lengths of the contact line segments indicated by two-dot chain lines in FIGS. 2 and 6 are L1 and L2, respectively. In the case of surface contact, the maximum widths measured in the direction parallel to the seating surface are L1 and L2, respectively.

In the face mill 100 to which the general-purpose tip 1A and the high-feed tip 1B described above are mounted, the tool body 101 has a substantially cylindrical shape as shown in FIGS. 8 and 9, and along the tool axis CL. A mounting hole 104 that penetrates the front end surface 102 and the rear end surface 103 is formed. In the tool body 101, the rear end face 103 is brought into close contact with the main spindle or arbor end face of a machine tool (not shown), and a fixing bolt (not shown) is fixed in a state where a shaft protruding from the end face is inserted into the mounting hole 104. It is attached to the main shaft of the machine tool by means and is rotatable around the axis.

Five tip seats 105 are cut out at substantially equal intervals in the circumferential direction on the outer periphery of the tip of the tool body 101. A floor plate 106 for seating the chips 1A and 1B is attached to the seating surface 105a of these chip seats 105 by means of hexagon socket bolts (not shown). In the hexagon socket head cap screw, a female screw hole into which a clamp screw for fixing the chips 1A and 1B is screwed is formed along the axial center. Restraining wall surfaces 105b and 105c for positioning the chips 1A and 1B are respectively formed on the two wall surfaces rising from the seating surface 105a. Further, a tip pocket 107 is formed in a region in front of the tool rotation direction K connected to each tip seat 105, and cutting oil supplied from the outside of the tool body 101 circulates on the wall surface of the tip pocket 107. In addition, a fluid supply hole 108 for spraying near the cutting point is opened.

9 and 11, the general-purpose tip 1 </ b> A and the high-feed tip 1 </ b> B abut each seating surface 3 against a seating surface 106 a which is one end surface of the floor plate 106 and two reference side surfaces 18 c facing the tool rear end side. , 16c are placed in contact with the constraining wall surfaces 105b, 105c of the chip seat 105, and a clamp screw 109 inserted through the mounting holes 5 of the chips 1A, 1B is provided on a hexagon socket head cap screw for fixing the base plate. It is fixed to the tool body 101 by being screwed into the female screw hole. In the general-purpose tip 1 </ b> A and the high-feed tip 1 </ b> B mounted on the face mill 100, the auxiliary cutting edge 5 positioned on the tool tip side is set to be perpendicular to the tool axis CL. The main cutting edge 6 located on the outer peripheral side of the tool and used for cutting has an approach angle that is an angle formed with the tool axis, and the approach angle δ1 when the general-purpose tip 1A is mounted is 45 ° ( The approach angle δ2 when the high-feed tip 1B is mounted is set to 50 ° to 75 ° (see FIG. 10). Further, in the high feed 1B, an auxiliary cutting edge 8 is continuously provided on the tool rear end side of the main cutting edge 6, and the approach angle δ3 of the auxiliary cutting edge 8 is 45 ° (see FIG. 10). .

The effects of the face mill (rolling tool) 100 and the high feed tip 1B described above will be described below. According to the face mill 100 of the present embodiment, the general-purpose tip 1A and the high-feed tip 1B capable of high-feed processing than the general-purpose tip 1A can be selectively mounted on one tool body 101. It is not necessary to prepare the tool body 101 for each of the chips 1A and 1B, and it is economical, and the application range of feeding is widened and highly efficient machining is possible. In the cutting application conditions, the general-purpose tip 1A is a tip having a versatility that can be applied to low-cutting and deep-cutting because the cutting limit value is larger than that of a high-feeding tip. On the other hand, the high feed tip 1B is a tip having a cutting depth value smaller than that of the general-purpose tip 1A, but capable of high feed and having high cutting performance at high feed.

The high-feed tip is formed so that the width L2 of the reference side abutting against the support wall surface of the tip seat is in the range of 50% to 90% of the width L1 of the reference side of the general-purpose tip. It is positioned accurately and is firmly supported and fixed without moving in the tip seat 105 even during high-feed machining. Further, since the support wall surfaces 105b and 105c of the chip seat 105 are not easily deformed and damaged, the positioning accuracy of the high-feed chip 1B and the general-purpose chip 1A can be maintained for a long time. When the width L2 of the reference side surface 18c of the high-feed tip 1B is less than 50% of the width L1 of the reference side surface 16c of the general-purpose chip 1A, the positioning accuracy of the high-feed tip 1B deteriorates or the support wall surface 105b of the chip seat 105, 105c may be deformed or damaged, and if it exceeds 90%, the shape of the main cutting edge 6 of the high-feed tip 1B may be restricted. Further, in FIG. 3, the high feed tip 1 </ b> B is counterclockwise in FIG. 3 with the central axis of the tip 1 </ b> B as the center of rotation due to the cutting resistance acting on the main cutting edge 6 of the corner portion A used for cutting. However, the reference wall surface 18c of the corner portion B and the corner portion C is formed to be offset toward the adjacent corner portion C and the corner portion D side in the clockwise direction in FIG. , 105c, the rotation in the counterclockwise direction is prevented. As shown in FIG. 3, the reference side surface 18c formed between adjacent corner portions AB, BC, CD, DA is preferably formed on both sides including the central portion between the corner portions. Then, the sitting when the chip 1B is mounted on the chip seat 105 is improved.

In the face mill 100 of the present embodiment, the approach angle δ2 when the high-feed tip 1B is mounted is larger than the approach angle δ1 when the general-purpose tip 1A is mounted. In comparison with the general-purpose tip 1A, the tip 1B has a smaller net cutting thickness in the normal direction of the main cutting edge 6 and a smaller load on the main cutting edge 6, and the ratio of the back component force in the cutting resistance is smaller. Tool chatter is suppressed when the direction of the cutting force increases and the direction of the cutting force approaches the direction of the tool axis CL, so that high-feed machining is possible. The high feed processing is realized by mounting the high feed tips 1B on all the tip seats 105 of the face mill 100. The approach angle δ2 of the face mill 100 equipped with the high feed tip 1B is preferably in the range of 50 ° to 75 °. This is because if it is less than 50 °, damage to the main cutting edge 6 and tool chatter are likely to occur during high-feed machining, and if it exceeds 75 °, the cutting limit value is too small and the practicality becomes low. It is.

The seat surface 105a and the support wall surfaces 105b and 105c of the tip seat 105 provided on the tool body 101 of the face mill 100 are respectively provided on the seating surface 3 and the reference side surfaces 16c and 18c provided in the general-purpose tip 1A and the high-feed tip 1B. By making the contact possible, the general-purpose tip 1A and the high-feed tip 1B can be selectively mounted on one tool body 101.

In the high-feed tip 1B of the present embodiment, the seating surface 3 that contacts the seating surface 105a of the tip seat 105 and the reference side surface 18c that contacts the support wall surfaces 105b and 105c of the tip seat 105 are the seating surface 3 of the general-purpose chip 1A. Since both of the chips 1A and 1B are formed in the same plane as each of the reference side surfaces 16c, the tool main body 101 can be mounted.

In the high-feed tip 1B, the shape of the main cutting edge 6 in plan view of the tip 1B is different from that of the general-purpose tip 1A so that the advantage of high feed performance can be obtained. That is, the angle formed between the main cutting edge 6 and the auxiliary cutting edge 5 is in the range of 105 ° to 135 ° in the general-purpose chip 1A so that the approach angle in the face mill 100 is large, whereas it is for high feed. In the chip 1B, the range is 140 ° to 165 °.

In the high feed tip 1B of the present embodiment, the length of the main cutting edge 6 is preferably in the range of 3 mm to 5 mm in order to prevent an increase in cutting resistance. When the length of the main cutting edge 6 is less than 3 mm, the cutting is restricted, so that practicality may be lost. When the length exceeds 5 mm, the cutting resistance increases and chatter vibration may occur. Furthermore, it is preferable that the length of the auxiliary cutting edge 5 be in the range of 1 mm to 3 mm. This is in consideration of the flatness and surface roughness of the machined surface in high feed machining. If the length of the sub cutting edge 5 is less than 1 mm, the surface roughness of the machined surface may be deteriorated. If it exceeds 1, chatter vibration may occur in the face mill 100 and the work material.

Further, the reference side surface 18c of the high-feed tip 1B is disposed in the lower region of the auxiliary cutting edge flank 18a on the inner side of the tip from the plane extending the auxiliary cutting flank 18a. , Part of which is formed so as to bite into the lower region of the main cutting edge 6. Therefore, in this reference side surface 18c, the width L2 in the direction parallel to the seating surface 3 in the region contacting the chip seat 105 is 50% to 90% of the width L1 contacting the chip seat 105 of the reference side surface 16c of the general-purpose chip 1A. A considerable width is secured, and the mounting accuracy to the tip seat 105 is good, and deformation of the support wall surface due to high cutting resistance during high-feed machining is prevented.

The auxiliary cutting edge 8 formed on the rear end side of the tool with respect to the main cutting edge 6 is, for example, face milled on the surface of the workpiece with large irregularities when the cutting amount exceeds the cutting limit value of the main cutting edge 6. When the depth of cut is not uniform and suddenly increases as in the case of, the excess portion is cut, and the chip 1 and the tool body 101 are prevented from being damaged or broken.

In the high feed tip 1B of the present embodiment, in order to increase the chipping resistance of the cutting edges 5, 6, 7, and 8 during high feed processing, the inner region connected to the side ridge portion of the rake face 2 A substantially flat land surface may be formed along the ridge. This land surface is formed at least on the main cutting edge 6 and is preferably formed over the entire edge of the rake face. More specifically, the width of the land surface is preferably in the range of 0.05 mm to 0.30 mm. This is because if the thickness is less than 0.05 mm, the chipping resistance of the cutting edge may not be improved, and if it exceeds 0.30 mm, the cutting resistance increases and chatter vibration may occur. The angle formed between the land surface and the main cutting edge first flank 16a is in the range of 70 ° to 87 °, and the angle formed between the land surface and the auxiliary cutting blade flank 15 is 60 ° to 80 °. The range is preferable. The reason for limiting the angle in this way is that if the lower limit is not reached, the effect of increasing the chipping resistance of the cutting edge may not be obtained, and if the upper limit is exceeded, the cutting resistance increases.

Furthermore, in order to reduce the cutting resistance at the time of high feed processing, a positive rake angle inclined so as to gradually approach the seating surface 3 as it goes inward from the land surface in the inner region connected to the land surface. The rake face 2a provided with may be formed. The rake angle is preferably in the range of 10 ° to 30 °. When the rake face 2 is inclined with a curved surface, an inclination angle formed by a tangent at a position where the rake face 2 intersects the land surface is set as a rake angle. The rake face to which the positive rake angle is imparted only needs to be formed on at least the main cutting edge 6. Moreover, the rake face 2a provided with the positive rake angle described above may be connected to the cutting edges 5, 6, 7, 8 of the side ridge portion without going through the land face. Inside the inclined rake face 2 a, a flat face 2 b is formed that surrounds the mounting hole 4 at the center of the rake face 2 and is parallel to the seating face 3. The reason for limiting the rake angle to the range of 10 ° to 30 ° is that if the angle is less than 10 °, it is difficult to obtain the effect of reducing the cutting resistance, and if it exceeds 30 °, the cutting edge of the cutting edge becomes sharp and the fracture resistance decreases. Because it will end up.

Furthermore, honing for improving the fracture resistance of the cutting edge may be formed on the cutting edges 5, 6, 7, and 8 formed on the side ridges. This honing has a large effect of increasing the fracture resistance by being formed over the entire side ridge. This honing is a cross section cut by a plane orthogonal to the cutting edges 5, 6, 7, 8 and smoothly contacts either the rake face 2 or the land face and the flank faces 15, 16, 17, 18a. It is arcuate or curved. More specifically, in the honing having a circular cross section, the radius of curvature of the circular arc is preferably in the range of 0.03 mm to 0.10 mm. This is because if it is less than 0.03 mm, it is difficult to obtain the effect of increasing the chipping resistance of the cutting edge, and honing exceeding 0.10 mm is difficult to mold and may increase the cutting resistance. In honing having a curved cross section, the curved line smoothly connects an arc smoothly connected to one of the rake face 2 and the land face and an arc smoothly connected to the flank faces 15, 16, 17, 18a to each other. The rake face side has a width of 0.04 mm to 0.10 mm, the flank face side has a width of 0.02 mm to 0.05 mm, and the flank faces 15, 16 , 17, and 18a, the radius of curvature of the circular arc smoothly connected to 0.015 mm to 0.040 mm is preferable. This is because, in the limitation of the honing width and the radius of curvature of the arc, if the lower limit value is not reached, it is difficult to obtain the effect of increasing the fracture resistance of the cutting blade, and if the upper limit value is exceeded, the cutting resistance increases. is there.

It is desirable that the sub cutting edge 5 be formed in a straight line shape or a curved shape slightly protruding outward in a plan view as viewed from the thickness direction of the chip 1B. Even if the angle formed between the auxiliary cutting edge 5 and the axial center CL of the face mill 100 is slightly deviated from a right angle, the cross-sectional shape of the processed surface is connected to the curved line. This is particularly desirable because the corrugated shape is maintained and the surface roughness and appearance quality of the processed surface are not deteriorated.

As mentioned above, although embodiment of this invention was described based on drawing, these are one embodiment to the last, and this invention can be implemented in the aspect which added the various change and improvement based on the knowledge of those skilled in the art. . For example, in the plan view of the tip 1, the main cutting edge 6 of the high-feed tip 1B is not limited to a linear shape, but can be changed to an arc shape, a curved shape, or an approximate curved shape composed of a plurality of straight lines.

It is the top view which looked at the chip | tip for high feed to which this invention is applied from the thickness direction. FIG. 2 is a side view of the high feed tip shown in FIG. 1. FIG. 2 is a rear view of the high feed tip shown in FIG. 1. It is the S1-S1 line cutting part end surface enlarged view in FIG. It is the top view which looked at the general purpose chip from the thickness direction. FIG. 6 is a side view of the general-purpose chip shown in FIG. 5. FIG. 6 is a rear view of the general-purpose chip shown in FIG. 5. It is the front view which looked at the face mill equipped with the high feed tip shown in FIG. 1 from the tool tip side. It is the side view seen from the direction orthogonal to the axial center of the face mill shown in FIG. It is a partial cross section side view of the front milling machine shown in FIG. It is the side view seen from the direction orthogonal to the axial center of the front milling machine which equipped with the general purpose chip shown in FIG. It is a partial cross section side view of the front milling machine shown in FIG. It is a top view of the chip seat of the conventional cutting tool. It is a bottom view of the chip | tip with which the chip seat shown in FIG. 13 is mounted | worn. It is a bottom view of the other chip | tip with which the chip seat shown in FIG. 13 is mounted | worn. It is a disassembled perspective view of the conventional cutting tool which consists of a tool main body and four types of chip | tips which can be mounted | worn with this tool main body. It is a top view of the chip seat of the tool main body shown in FIG.

Explanation of symbols

1A General-purpose tip 1B High-feed tip 2 Rake face 2a Rake face with rake angle 3 Seating face 5 Sub cutting edge 6 Main cutting edge 7 Corner cutting edge 8 Auxiliary cutting edge 15 Sub cutting edge flank 16 Main cutting edge flank 17 Corner blade flank 18a Auxiliary cutting blade flank 18b Curved portion 16c, 18c Reference side surface 100 Front milling (rolling tool)
101 Tool body 105 Tip seat 105a Chip seat seating surface 105b, 105c Tip seat support wall 106 Base plate 106a Base plate seating surfaces A, B, C, D Corner portion δ1 Approach angle δ2, δ3 of a face mill equipped with a general-purpose tip Approach angles L1 and L2 of the face mill equipped with high feed tips Reference side width

Claims (10)

The one or a plurality of chip seats formed in a notch on the outer periphery of the tip of the tool body having a substantially cylindrical shape has a substantially polygonal plate shape, and an upper surface facing the seating surface is a rake surface. In the rolling tool in which the tip in which at least one main cutting edge is formed on each side ridge is mounted,
The tip seat can be mounted with a general-purpose tip and at least one high-feed tip having a shape different from that of the main cutting edge.
The general-purpose chip has a substantially regular polygonal plate shape, or a plate shape in which a sub cutting edge is formed at a corner portion of a substantially regular polygon.
The high-feed tip has a substantially regular polygonal plate shape as a basic shape, and a main cutting edge is formed so as to cut out a side edge of the substantially regular polygon.
When the approach angle of the main cutting edge when the general-purpose tip is mounted on the rolling tool is δ1, and the approach angle of the main cutting edge when the high-feed tip is mounted is δ2, δ1 The relationship with δ2 is δ1 <δ2,
Each of the general-purpose tip and the high-feed tip comes into contact with a seating surface of the tip seat, and at least one reference side surface comes into contact with a support wall surface rising from the seat surface of the tip seat. Attached to the chip seat,
The width L1 of the reference side of the general-purpose chip, milling tool relationship between the width L2 of the reference side surface of the high-feed chip, characterized in that there is a 0.5L1 ≦ L2 ≦ 0.9L1. The approach angle δ1 of the main cutting edge of the general-purpose tip in the rolling tool is 15 ° to 45 °, and the approach angle δ2 of the main cutting edge of the high-feed tip is 50 ° to 75 °. The turning tool according to claim 1. The rolling according to claim 1 or 2, wherein a seating surface and a supporting wall surface of the tip seat are capable of abutting against the respective seating surfaces and reference side surfaces of the general-purpose tip and the high-feed tip. tool. The turning tool according to any one of claims 1 to 3, wherein the high-feeding tip is mounted on all tip seats. In the high feed tip to be mounted on the turning tool according to any one of claims 1 to 4,
The seating surface and the reference side surface of the high-feed tip are formed in the same plane as each of the seating surface and the reference side surface of the general-purpose tip,
The high-feed tip, wherein the relation between the width L2 of the reference side surface of the high-feed tip and the width L1 of the reference side surface of the general-purpose chip is 0.5L1 ≦ L2 ≦ 0.9L1. The shape of the main cutting edge formed in the side ridge part of the upper surface in a plan view as viewed from the thickness direction of the chip is different from the shape of the main cutting edge of the general-purpose chip. Chip for feeding. The high feed tip mounted on the rolling tool according to any one of claims 1 to 4, wherein the approach angle when the high feed tip is mounted is more than the approach angle when the general-purpose tip is mounted. The high-feed tip according to claim 5 or 6, wherein the tip is large and has a range of 50 ° to 75 °. The high feed tip according to any one of claims 5 to 7, wherein the length of the main cutting edge is in the range of 3 mm to 5 mm. The high cutting speed according to any one of claims 5 to 8, wherein a secondary cutting edge for finishing a processed surface is formed, and the length of the secondary cutting edge is in a range of 1 mm to 3 mm. Chip. The said reference side surface is formed in the downward area | region of the flank which extends from the side ridge part of an upper surface, and is formed from the flat plane located inside the said flank. The high feed tip according to any one of the above.

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