JP2005319529A - Throwaway tip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tip which can be used for both of rough machining and finish machining by improving chipping resistance and deficit resistance of a cutting edge in rough machining and chip treatability in finish machining in the machining of an aluminum alloy or the like. <P>SOLUTION: The tip 1 has the cutting edge made of any one of diamond, a diamond sintered body, and a diamond coated member. Honing 80 is executed along cutting edge ridge parts 8c, 8d of the cutting edge of the tip 1. The honing 80 is compound honing 80c composed of a flat face 82c inclined to a rake face 2a and a cylindrical face 81c smoothly continuous to the flat face 82c and a flank 2b. The inclination angle α2 of the flat face 82c to the rake face 2a is set in a range of ≥10° and ≤45°. The curvature radius R2 of the cylindrical face 81c is set in a range of over 0 mm and up to 0.050 mm. The width W2 of the compound honing 80c is set in a range of larger than 0.07 mm and up to 0.30 mm. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a throw-away tip for cutting (hereinafter referred to as “chip”), and particularly to a tip having a cutting edge made of any one of diamond, a diamond sintered body, and a diamond-coated member.

A conventional example of a chip having a cutting edge made of a diamond sintered body is illustrated in FIGS. FIG. 13 and FIG. 14 are an exploded perspective view and a main part enlarged sectional view of a conventional chip, respectively. As shown in these drawings, this chip (1) is formed by using a diamond sintered body as a cutting edge and honing (80) on the cutting edge ridges (8a, 8b). In this way, honing (80) makes it difficult for chipping to occur on the cutting edge. (For example, see Patent Document 1)

JP 2002-254213 A

The chip (1) having a cutting edge made of a diamond sintered body exhibits excellent wear resistance and welding resistance in the processing of non-ferrous metals such as aluminum alloys, but tends to cause chipping and chipping. Applying honing (80) to the cutting edge ridges (8a, 8b) as in conventional chips is an effective means for preventing chipping and chipping. However, since the shape of the honing (80) is limited in order to suppress the deterioration of the machined surface roughness, for example, in rough machining in profiling where the cutting is temporarily very large, a very large load is applied to the cutting edge. As shown in FIG. 15, there is a problem that the chipping occurs and the cutting edge life is remarkably reduced. In order to avoid such a problem, a chip made of a cemented carbide which is less likely to be broken than a diamond sintered body has been used for roughing, but the wear of the cutting edge progresses quickly, and welding to the cutting edge is difficult. Since it occurred remarkably, a significant improvement in the cutting edge life could not be expected. Even if a chip made of cemented carbide has a practical life in roughing, a chip with a cutting edge made of a diamond sintered body is used in finishing processing where the surface roughness is important. Since it is preferable to do this, roughing and finishing cannot be combined with one chip. For this reason, it is necessary to prepare dedicated tips for roughing and finishing, respectively, and there are problems such as complicated tool management and soaring tool costs, increased time required for tool change and tip change and corner change during processing. . On the other hand, in the finishing process with a small depth of cut, the thickness of the chip becomes thin, so that a chip having a large curl radius and easily entangled is likely to be generated. In particular, in finishing processing in profiling, the change in the feed direction of the cutting tool is large and frequently occurs, so that the chip thickness becomes thin and the outflow direction varies greatly. For this reason, there is a tendency for chips to damage the work surface or to wind around the cutting tool. From the above, it is very difficult to combine roughing and finishing with one chip, but no chip has solved such a problem.

The present invention has been made in view of the above circumstances, and the purpose thereof is the chipping resistance and chipping resistance of the cutting edge in rough machining with high load on the cutting edge in the processing of non-ferrous metals such as aluminum alloys. It is another object of the present invention to provide a chip that can be used for both roughing and finishing by improving chip controllability in finishing.

According to the studies by the present inventors, when machining a non-ferrous metal such as an aluminum alloy using a chip having at least a cutting edge made of diamond, a diamond sintered body, or a diamond-coated member, the rake face of the cutting edge and Honing is performed along the cutting edge ridge line formed at the intersection ridge line with the flank, and by setting this honing to a predetermined shape, the chipping resistance and chipping resistance of the cutting edge in rough machining are greatly enhanced. At the same time, the inventors have obtained the knowledge that the chip disposal in finishing can be improved, and have reached the present invention. The diamond sintered body constituting the cutting edge is obtained by a known method in which diamond is a main component and ceramic and metal are sintered. Alternatively, the cutting edge may be composed of single crystal diamond or a hard material such as cemented carbide, cermet, ceramic, etc., coated with a diamond coating.

About the said honing, the form described below is preferable. The first form is a round honing comprising a cylindrical surface smoothly connected to the rake surface and the flank surface, and the radius of curvature (R1) of the cylindrical surface is greater than 0.07 mm and less than or equal to 0.30 mm. Is set.

The second form is an angle honing composed of a flat surface inclined with respect to the rake face, and an inclination angle (α1) of the flat face with respect to the rake face is set in a range of 10 ° to 45 °. The width (W1) when viewed from the direction perpendicular to the rake face is set in the range of greater than 0.07 mm and less than or equal to 0.30 mm.

A third form is a composite honing composed of a flat surface inclined with respect to the rake surface and a cylindrical surface smoothly connected to the flat surface and the flank surface, and an inclination angle of the flat surface with respect to the rake surface ( α2) is set in the range of 10 ° to 45 °, the radius of curvature (R2) of the cylindrical surface is set in the range of greater than 0 mm and less than or equal to 0.050 mm, and further viewed from the direction perpendicular to the rake face. The width (W2) of the composite honing at the time is set in a range of more than 0.07 mm and not more than 0.30 mm.

According to the chip of the present invention, since the cutting edge is made of any one of diamond, a diamond sintered body, and a diamond-coated member, it exhibits excellent wear resistance and welding resistance in the processing of non-ferrous alloys such as aluminum alloys. . Furthermore, in rough machining with a high load on the cutting edge, chipping and chipping of the cutting edge can be prevented by the above honing formed on the edge of the cutting edge, so that the cutting edge life is improved. In particular, in the rough machining in the copying process in which the cutting becomes temporarily very large, the improvement of the cutting edge life becomes remarkable. Further, in the finishing process, the curl radius of the chip can be reduced and the chip can be divided into short pieces, so that the chip disposal is improved. In particular, in the finishing process in the copying process, the above-described improvement in chip disposal becomes remarkable. From the above, it is possible to combine roughing and finishing with a single chip. Therefore, there is no need to prepare dedicated inserts for each of roughing and finishing, which simplifies tool management and prevents tool costs from rising, and increases the time required for tool change, insert change and corner change during machining. By preventing this, the processing efficiency can be improved.

A chip according to a preferred embodiment for carrying out the present invention will be described below with reference to FIGS. FIG. 1 is a view showing a chip according to the present embodiment, in which (a) is a plan view and (b) is a front view. 2 to 4 are sectional views taken along line XX in FIG. As shown in FIG. 1, the chip (1) is a stepped portion having a triangular shape in plan view recessed at acute corner portions (two locations) of the rake face (2a) of the base portion (2) having a substantially rhomboid plate shape (2). In 3), the cutting blade member (4) is placed and fixed by a known fixing means such as brazing. The apex angle of the above-mentioned acute corner portion is set to 35 °. The said base part (2) is comprised, for example from hard alloys, such as a cemented carbide alloy and a cermet, and screwed to the holder main body (10) of cutting tools, such as a bite holder and a face mill, for example in the center part. The clamp screw insertion hole (5) passes therethrough. On the other hand, the cutting blade member (4) is obtained by laminating a base metal (6) made of a hard alloy such as a cemented carbide and a diamond sintered body (7) and integrally sintering the diamond sintered body. The body (7) is directed to the rake face (2a) side of the tip (1) to form the rake face (2a). The diamond sintered body (7) may be directly fixed to the step (3).

The tip (1) has a flank (2b) on its side surface, and gradually goes outward as it approaches the rake face (2a) from the lower face (9) facing the rake face (2a) as shown in FIG. This is a positive tip having a so-called positive clearance angle which is an inclined surface projecting toward the surface. Cutting edge ridges (8c, 8d) are formed at the intersection ridgeline between the flank (2b) and the rake face (2a). Honing (80) is performed along the cutting edge ridges (8c, 8d). The cross-sectional shape of the honing (80) is preferably the form shown in FIGS.

First, what is shown in FIG. 2 is a round honing (80a) in which a rake face (2a) and a flank face (2b) are connected by a cylindrical surface (81a). For example, diamond loose abrasive grains are applied to a rotating brush. It is formed by polishing the vicinity of the cutting edge ridges (8c, 8d). The radius of curvature (R1) of the cylindrical surface (81a) is set in a range greater than 0.07 mm and less than or equal to 0.30 mm. At this time, the cylindrical surface (81a) is smoothly connected to the rake surface (2a) and the flank surface (2b). Here, the term “smoothly connected” means that the rake face (2a) and the flank face (2b) are connected in the tangential direction of the cylindrical surface (81a), and this connected portion has no corners. The reason for this is that when the radius of curvature (R1) is 0.07 mm or less, chipping or chipping of the cutting edge tends to occur when roughing is performed, and when roughing and finishing are performed. This is because the chips become difficult to curl and extend for a long time. On the other hand, when the radius of curvature (R1) exceeds 0.30 mm, although there is no adverse effect on chip disposal, tool chatter occurs due to an increase in cutting resistance or a decrease in sharpness when roughing is performed, resulting in a cutting edge. There is a risk of causing chipping, chipping or deterioration of the machined surface roughness. Further, when a corner is formed at a connecting portion between at least one of the rake face (2a) or the flank face (2b) and the cylindrical surface (81a), the work material is welded or pressed to the connecting portion. May cause deterioration of the machined surface roughness of the work material, and may cause chipping or chipping of the cutting edge by repeated removal and generation of the work material. Because there is. The radius of curvature (R1) of the cylindrical surface (81a) is more preferably set in the range of 0.10 mm to 0.20 mm. By doing so, the strength of the cutting edge can be further increased, chipping and chipping can be further prevented, cutting resistance can be further suppressed, and the cutting tool itself or the cutting tool can be attached with low rigidity, or the workpiece can be cut. Chatter vibration can be prevented even when the attachment state of the material itself or the work material is low in rigidity.

Next, what is shown in FIG. 3 is an angle honing (80b) comprising a flat surface (82b) inclined with respect to the rake surface (2a), and is formed by a known processing method such as grinding with a grinding wheel. The The angle honing when the inclination angle (α1) of the flat surface (82b) with respect to the rake face (2a) is set in the range of 10 ° to 45 ° and viewed from the direction perpendicular to the rake face (2a). The width (W1) of (80b) is set in a range greater than 0.07 mm and less than or equal to 0.30 mm. The reason for this is that if the inclination angle (α1) is less than 10 °, chipping or chipping of the cutting edge is likely to occur when roughing is performed, and cutting is performed when roughing and finishing are performed. This is because the scrap does not curl and easily extends for a long time. When the inclination angle (α1) exceeds 45 °, tooling may occur due to an increase in cutting resistance or a decrease in sharpness when roughing is performed. This is because there is a risk of causing chipping, chipping, and deterioration of the machined surface roughness. Further, when the width (W1) is 0.07 mm or less, chipping or chipping of the cutting edge is likely to occur when roughing is performed, and when the width (W1) exceeds 0.30 mm, roughing is performed. This is because tool chatter may occur due to an increase in cutting resistance or a decrease in sharpness, which may cause chipping or chipping of the cutting edge, and deterioration of the surface roughness. More preferably, the inclination angle (α1) is set in a range of 10 ° to 35 °, and the width (W1) is set in a range of 0.10 mm to 0.20 mm. By doing so, the strength of the cutting edge can be further increased, chipping and chipping can be further prevented, cutting resistance can be further suppressed, and the cutting tool itself or the cutting tool can be attached with low rigidity, or the workpiece can be cut. Chatter vibration can be prevented even when the attachment state of the material itself or the work material is low in rigidity.

Next, what is shown in FIG. 4 includes a flat surface (82c) inclined with respect to the rake surface (2a) and a cylindrical surface (81c) smoothly connected to the flat surface (82c) and the flank (2b). After the flat surface (82c) is formed by a known processing method such as grinding with a grinding wheel, the cylindrical surface (81c) is formed with, for example, diamond free abrasive grains as a rotating brush. It is formed by applying and polishing the vicinity of the cutting edge ridges (8c, 8d). The inclination angle (α2) of the flat surface (82c) with respect to the rake surface (2a) is set in a range of 10 ° to 45 °, and the radius of curvature (R2) of the cylindrical surface (81c) is larger than 0 mm and 0. The width (W2) when the composite honing (80c) is viewed from the direction perpendicular to the rake face (2a) is greater than 0.07 mm and less than or equal to 0.30 mm. Is set. The reason for this will be described below. When the inclination angle (α2) is less than 10 °, chipping or chipping of the cutting edge is liable to occur when roughing is performed, and chips are not curled and long when roughing and finishing are performed. It becomes easy. On the other hand, when the tilt angle (α2) exceeds 45 °, tooling occurs due to an increase in cutting resistance or a decrease in sharpness when roughing is performed, leading to chipping or chipping of the cutting edge, and deterioration of the machined surface roughness. May cause. When the width (W2) is 0.07 mm or less, chipping or chipping of the cutting edge is likely to occur when roughing is performed, and when the width (W2) exceeds 0.30 mm, roughing is performed. In this case, tool chatter may occur due to an increase in cutting resistance or a decrease in sharpness, which may cause chipping or chipping of the cutting edge and deterioration of the surface roughness. More preferably, the inclination angle (α2) is set in a range of 10 ° to 35 °, and the width (W2) is set in a range of 0.10 mm to 0.20 mm. Then, the strength of the cutting edge can be further increased, chipping and chipping can be further prevented, the cutting resistance is suppressed, and the cutting tool itself or the cutting tool is attached with low rigidity, or the work material Chatter vibration can be prevented even when the mounting state of itself or the work material is low in rigidity. If a cylindrical surface (81c) smoothly connected to each of the flat surface (82c) and the flank (2b) is provided at the intersection of the inclined flat surface (82c) and the flank (2b). Since the adhesion of the work material at the intersecting portion is suppressed, such as the adhesion of the work material, the deterioration of the machined surface roughness of the work material can be prevented, and the attached work material can be prevented from dropping and repeating. Therefore, chipping and chipping of the cutting edge are prevented. The radius of curvature (R2) of the cylindrical surface (81c) may be larger than 0 mm, but if it is too small, the circular arc shape of the cross section of the cylindrical surface (81c) may not be formed accurately. More preferably, it is set. Moreover, since there exists a possibility that manufacturing time and cost may become high when larger than 0.050 mm, it is preferable to set to 0.050 mm or less. Furthermore, it is preferable that the cylindrical surface (81c) is smoothly connected to the inclined flat surface (82c) and the flank (2b) so that there are no corners.

The effect of the chip of the above-described embodiment will be described below. According to the chip of the above-described embodiment, since the cutting edge is made of a diamond sintered body, excellent wear resistance and welding resistance are exhibited in the processing of a non-ferrous alloy such as an aluminum alloy. Furthermore, chipping and chipping of the cutting edge can be prevented in both roughing and finishing, and chip disposal can be improved, so that the cutting edge life is extended and tool costs are reduced. I can be taken. Furthermore, since a single insert can be used for both roughing and finishing, it is not necessary to prepare dedicated inserts for each of roughing and finishing, which simplifies tool management and reduces tool costs. In addition, the machining efficiency can be improved by reducing the setup time required for tool change, cutting edge corner change and chip change in the machine tool.

By the way, as shown in FIG. 5 to FIG. 7, in profiling, abrupt fluctuations in the feed direction of the cutting tool and arc-shaped machining frequently occur at corners and corners of machining sites. Sudden fluctuations in volume, instantaneous maximums and minimums are likely to occur, and changes in chip thickness and outflow direction also increase. Therefore, the load on the cutting edge tends to be high, and chips with a small thickness that tend to stretch and become entangled are likely to be wound around the cutting tool or damage the work surface. In such copying, if the chip according to the present embodiment is used, the above-described effects can be maximized. That is, in rough machining or the like in the profiling process in which the cutting becomes temporarily very large, chipping or chipping of the cutting edge can be prevented, and the cutting edge life is greatly improved. Further, in finishing processing in copying, the curl radius of the chip can be reduced and the chip can be cut short, so that the chip processing performance is greatly improved.

From the above, as a chip to which the present invention is applied, in addition to the chip illustrated in FIG. 1, a chip suitable for the copying process illustrated in FIGS. 8, 9, and 10 is preferable. The tip illustrated in FIG. 1 is a substantially rhomboid flat tip having an acute angle of 35 °, and an arcuate cutting edge ridge line portion (8d) is formed at the corner portion of the acute angle. Has been. The chip illustrated in FIG. 8 is a substantially circular flat chip, and a cutting edge ridge line portion (8c) made of a diamond sintered body is formed on a part of a side ridge portion having a circular shape. The cutting edge ridge portion (8c) is suitable for high-feed machining, and various diameters of the circular shape are set, and it is suitable for copying the machining portion of the corner. In addition, the cutting edge ridgeline part (8c) which consists of said diamond sintered compact may be provided over the whole edge part which makes circular shape. The chip illustrated in FIGS. 9 and 10 is a so-called dogbone type chip having a strip shape and similar in shape to a known grooving chip or parting chip. This chip is provided with cutting edge ridge lines (8c, 8d) at the top edge of one end or both ends in the longitudinal direction. 9 is formed into a shape suitable for copying such as a rectangular shape illustrated in FIG. 9, an arc shape illustrated in FIG. 10A, and an inverted V shape illustrated in FIG.

As described above, the chip shapes particularly suitable for copying are listed, but in addition to these chip shapes, there is a cutting edge made of a diamond sintered body, and rough machining with a very high load on the cutting edge, In the case of a chip that is also used for a finishing process in which chips are easily stretched and entangled, by applying the present invention, it is possible to significantly improve the cutting edge life and chip disposal.

Next, a comparative test was conducted on the cutting edge life and chip disposal between a chip according to an embodiment of the present invention (hereinafter referred to as “the chip of the present invention”) and a conventional chip outside the scope of the present invention. The results will be described below. The tip shown in FIG. 1 is a positive tip having a clearance angle of 7 °, which is a substantially rhombic flat plate having an apex angle of 35 °. An aluminum alloy automobile part was used as the work material, and the copying process illustrated in FIGS. 5 to 7 was performed on the automobile part. In this copying process, both roughing with a cutting depth ap of about 1 mm and finishing processing with a cutting depth ap of about 0.5 mm were performed with one chip. The honing (80) applied along the cutting edge ridges (8c, 8d) was the composite honing (80c) shown in FIG. Cutting speed (Vc) is about 1000 m / min. The feed amount (fr) is about 0.4 mm / rev. Wet turning using a water-soluble cutting fluid was performed. The shape and test results of the honing (80) of each chip are shown in Tables 1 and 2. The test result shown in Table 1 is the cutting edge life in rough machining, and the test result shown in Table 2 is chip disposal in rough machining and finishing. The “angle (α2)” described in Tables 1 and 2 is an inclination angle (α2) of the flat surface (82c) inclined with respect to the rake face (2a) with respect to the rake face (2a), “Width (W2)” is a width (W2) when the composite honing (80c) is viewed from a direction perpendicular to the rake face (2a), and “curvature radius (R2)” is the flat surface ( 82c) and the radius of curvature (R2) of the cylindrical surface (81c) smoothly connected to the flank (2b). The cutting edge life of each chip shown in Table 1 was compared by the number of processed automobile parts. In addition, regarding the determination of the chip disposal property described in Table 2, when the chip curl radius is small and divided into pieces, it is determined as “good”, and when the chip curl radius is greatly extended and long, “bad” Was determined.

As can be seen from the test results in Table 1, the inclination angle (α2) of the inclined flat surface (82c) of the composite honing (80c) provided in the cutting edge ridges (8c, 8d) is 10 ° to 45 °. The radius of curvature (R2) of the cylindrical surface (81c) smoothly connected to the flat surface (82c) and the flank (2b) is set to a range greater than 0 mm and less than or equal to 0.050 mm, The chip of the present invention in which the width (W2) when the composite honing (80c) is viewed from the direction perpendicular to the rake face (2a) is set in the range of more than 0.07 mm and not more than 0.30 mm is the composite honing ( Compared to the conventional insert in which the width (W2) or the inclination angle (α2) of 80c) was set to be smaller than the lower limit of the above range, the cutting edge life in roughing was significantly superior. When the width (W2) or the inclination angle (α2) of the composite honing (80c) is larger than the upper limit value in the above range, the cutting resistance during cutting is not significantly reduced, but the cutting resistance during machining is not observed. Tool chatter was likely to occur due to an increase in cutting speed and a decrease in sharpness. The cylindrical surface (81c) had an effect of stabilizing the cutting edge life by suppressing the welding of the work material to the cutting edge. Here, when the radius of curvature (R2) of the cylindrical surface (81c) is set to 0.003 mm or more, the shape of the cross section of the cylindrical surface (81c) is formed in an accurate arc shape, and the cutting edge life is stabilized. Increased the effect. However, if the radius of curvature (R2) is too large, it is disadvantageous in terms of manufacturing time and cost, so it is preferable to set it to 0.050 mm or less.

The result of comparing the chip shape between the above-described chip of the present invention and the conventional chip is shown in FIGS. 11 and 12 show chip shapes when the cutting amount ap is 1 mm (roughing) and 0.5 mm (finishing), respectively. Here, the inventive chip [2] shown in Table 2 is used as the inventive chip, and the conventional chip [5] shown in Table 2 is used as the conventional chip. As can be seen from these drawings, the chip [2] of the present invention has a small chip curl radius for both roughing and finishing, and is divided into short pieces, which causes scratching on the work surface and winding around the cutting tool. There was no. The other chips of the present invention shown in Table 2 also showed good chip disposal in both roughing and finishing as shown in this table. On the other hand, the chips generated from the conventional chip [5] had a large curl radius and extended a long time, resulting in abrasion on the work surface and winding around the cutting tool.

Conventional chips have defects at the beginning of machining in rough machining, so they can only be used for finishing, and can not be used for both roughing and finishing. No chip control was obtained. On the other hand, since the chip of the present invention has both a cutting edge life and a chip disposal property in roughing and finishing, it can be used for both roughing and finishing.

Next, the results of a test similar to the above performed on a chip in which round honing (80a) and angle honing (80b) are applied to the cutting edge ridges (8c, 8d) will be described below. In the tip subjected to round honing (80a) as shown in FIG. 2, the radius of curvature (R1) of the cylindrical surface (81a) provided along the cutting edge ridges (8c, 8d) is less than 0.07 mm. The insert according to the present invention, which is set to a large range of 0.30 mm or less, has a significantly superior cutting edge life in rough machining, as compared with a chip set smaller than the lower limit of this range, and rough machining and finishing machining. The chip-treatability at was excellent. In the case of a chip subjected to round honing with a radius of curvature larger than the upper limit of the above range, honing processing time may increase or processing cost may increase, and the cutting resistance during processing may increase. Tool chatter was likely to occur due to an increase in cutting speed and a decrease in sharpness.

On the other hand, in the tip subjected to the angle honing (80b) as shown in FIG. 3, the honing width (W1) is set in the range of 0.07 mm to 0.30 mm and the inclination angle (α1) is set. The tip according to the present invention set in the range of 10 ° or more and 45 ° or less is compared with the tip in which the width (W1) or the inclination angle (α1) of the honing (80) is set smaller than the lower limit value of the above range. The cutting edge life in roughing was greatly improved, and the chip disposal was excellent in both roughing and finishing. In the case where the honing width (W1) or the inclination angle (α1) is set to be larger than the upper limit of the above range, tool chatter occurs due to an increase in cutting resistance or a decrease in sharpness during processing. .

As mentioned above, although embodiment which concerns on this invention was described, it cannot be overemphasized that this invention is not what is limited to these embodiment. For example, since the cutting edge may be made of any one of diamond, a diamond sintered body, and a diamond-coated member, in addition to using as a chip, it may be used by brazing directly to the holder body (10). Good. Further, when a diamond film is coated on the surface of a chip made of a hard alloy such as a cemented carbide, honing is preferably performed in advance on the chip before diamond coating. Furthermore, in addition to the case where it is used as a tip for turning, it is possible to use it by attaching it to a turning tool such as a milling cutter or an end mill so that roughing and finishing can be combined with one tip. Furthermore, when the tip according to the present invention is used in a conventional milling cutter for simultaneous roughing and finishing with two different tips for roughing and finishing, a single tip is used for roughing. It can be used in combination with a chip and a finishing chip.

It is a figure of the chip | tip concerning embodiment of this invention, (a) is a top view, (b) is a front view. FIG. 2 is a cross-sectional view taken along the line XX in FIG. 1, illustrating a cross-sectional shape of honing. FIG. 2 is a cross-sectional view taken along the line XX in FIG. 1, illustrating a cross-sectional shape of honing. FIG. 2 is a cross-sectional view taken along the line XX in FIG. 1, illustrating a cross-sectional shape of honing. It is a figure which shows the tool path | route in copying. It is a figure which shows the other tool path | route in copying. It is a figure which shows the other tool path | route in copying. It is a figure of the chip concerning other embodiments, (a) is a top view and (b) is a front view. It is a figure of the chip concerning other embodiments, (a) is a top view, (b) is a front view, (c) is a left view. (A), (b) is a top view which shows the modification of the chip | tip shown in FIG. 9, respectively. It is a figure which shows the chip shape in the rough process of the chip | tip which concerns on embodiment of this invention. It is a figure which shows the chip shape in the finishing process of the chip | tip which concerns on embodiment of this invention. It is a disassembled perspective view of the conventional chip. It is a principal part expanded sectional view of the conventional chip | tip. It is a figure which shows the cutting blade damage example of the conventional chip | tip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tip 2 Base part 2a Rake face 2b Flank 3 Step part 4 Cutting blade member 5 Clamp screw insertion hole 6 Base metal 7 Diamond sintered compact 8a, 8b, 8c, 8d Cutting edge ridgeline part 9 Bottom face 80 Honing 80a Round honing 80b Angle honing 80c Compound honing 81a, 81c Cylindrical surface 82b, 82c Inclined flat surface 10 Holder body 11 Tip seat

Claims (6)

Honing is performed along the cutting edge ridge line portion formed at the crossing ridge line of the rake face and flank face of the throwaway tip of at least an insert composed of at least one of diamond, diamond sintered body, and diamond-coated member. In the throw-away tip, the honing is a round honing comprising a cylindrical surface smoothly connected to the rake surface and the flank surface, and a radius of curvature of the cylindrical surface is greater than 0.07 mm and less than or equal to 0.30 mm. A throw-away chip characterized by being set to. The honing is a round honing composed of a cylindrical surface smoothly connected to the rake surface and the flank surface, and the curvature radius of the cylindrical surface is set in a range of 0.10 mm to 0.20 mm. The throw-away tip according to claim 1. Honing is performed along the cutting edge ridge line portion formed at the crossing ridge line of the rake face and flank face of the throwaway tip of at least an insert composed of at least one of diamond, diamond sintered body, and diamond-coated member. In the throw-away tip, the honing is an angle honing composed of a flat surface inclined with respect to the rake face, and an inclination angle of the flat face with respect to the rake face is set in a range of 10 ° to 45 °. In addition, the throw-away tip is characterized in that a width of the angle honing when viewed from a direction perpendicular to the rake face is set in a range larger than 0.07 mm and not larger than 0.30 mm. The honing is an angle honing composed of a flat surface inclined with respect to the rake surface, and an inclination angle of the flat surface with respect to the rake surface is set in a range of 10 ° to 35 °, and the rake surface includes The throw-away tip according to claim 3, wherein a width of the angle honing when viewed from a vertical direction is set in a range of 0.10 mm to 0.20 mm. Honing is performed along the cutting edge ridge line portion formed at the crossing ridge line of the rake face and flank face of the throwaway tip of at least an insert composed of at least one of diamond, a diamond sintered body, and a diamond-coated member. In the throw-away tip, the honing is a composite honing composed of a flat surface inclined with respect to the rake face and a cylindrical surface smoothly connected to the flat face and the flank face, and the rake face of the flat face. Is set to a range of 10 ° to 45 °, the radius of curvature of the cylindrical surface is set to a range of greater than 0 mm and less than or equal to 0.050 mm, and when viewed from a direction perpendicular to the rake face The width of the composite honing is set in a range greater than 0.07 mm and less than or equal to 0.30 mm. Throw away tip. The honing is a composite honing composed of a flat surface inclined with respect to the rake surface and a cylindrical surface smoothly connected to the flat surface and the flank surface, and an inclination angle of the flat surface with respect to the rake surface is 10 °. The range of 35 ° or less is set, the radius of curvature of the cylindrical surface is set to a range of greater than 0 mm and 0.050 mm or less, and the width of the composite honing when viewed from a direction perpendicular to the rake face is The throw-away tip according to claim 5, wherein the throw-away tip is set in a range of 0.10 mm to 0.20 mm.