JP3898427B2 - Throw-away tip and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a throw-away tip used for cutting, and particularly to a throw-away tip provided with a sensor line for detecting wear of a cutting edge.
[0002]
[Prior art]
A throw-away tip that is mounted on a holder or the like and functions as a cutting blade is known. The throw-away tip is a disposable tip that is replaced without re-polishing when the cutting edge is worn. In the throw-away tip, a cutting edge is usually formed at each corner portion of a substantially flat base material based on a square or a triangle. And when the cutting edge ridge of one corner part wears, the cutting edge ridge of another corner part is used. And when the cutting edge ridges of all corner parts are worn, they are replaced.
[0003]
By the way, it is not easy to examine how much the cutting edge of the throw-away tip is worn. In particular, it is very difficult in the working environment to detect the wear amount of the cutting edge ridge without interrupting the cutting process during the cutting process.
[0004]
As a conventional method for detecting the wear amount of the cutting edge,
(1) A method of interrupting the cutting process, removing the throw-away tip from the holder, etc., and observing the cutting edge ridge with a tool microscope,
(2) Phenomena that accompany wear on the cutting edge, such as a decrease in cutting force, an increase in vibration, and the generation of abnormal noise, are detected by a sensor installed near the machined part on the machine tool, and the detection signal A method for estimating the wear amount of the cutting edge ridge based on
Etc.
[0005]
However, the above method (1) has to be performed by interrupting the cutting process, and further, there is a problem that the amount of wear of the cutting edge cannot be quantitatively detected and the accuracy is not good.
[0006]
Further, the method (2) has a problem that a complicated detection device is required, and that the wear amount detection sensitivity is poor and the reliability is insufficient.
[0007]
A proposal for solving these problems is described in Japanese Utility Model Laid-Open No. 3-120323. This publication discloses that a sensor line is provided with a conductive film along the edge of the cutting edge on the flank face of the throw-away tip. It is also disclosed that the width of the sensor line corresponds to the wear allowable width. Therefore, according to the throw-away tip disclosed in this publication, the sensor line is also worn with the wear of the cutting edge, and it can be determined that the cutting edge has reached the end of its life when the sensor line is interrupted.
[0008]
Japanese Laid-Open Patent Publication No. 9-38846 discloses that in a normal cutting tool that is not a throw-away tip, a thin film circuit is provided on the flank face, and the electric resistance increases as the thin film circuit wears as the flank face wears. There has been proposed a method for detecting the change and automatically determining the life of the cutting tool.
[0009]
[Problems to be solved by the invention]
In order to form the sensor line in the throw-away chip as described above, as shown in FIG. 7, unnecessary pattern portions (black portions in FIG. 7) are removed by irradiating with a laser. When the sensor line 12 is formed, it is necessary to irradiate the cutting blade 9 portion used in the cutting process with the laser, and the portion is once melted and re-solidified to a rough state.
[0010]
Cutting is performed by setting a cutting feed amount. For example, when 0.2 mm per revolution is advanced, cutting resistance is applied to the rake face 5 side from the ridge line of the flank 8 and the rake face 5 by 0.2 mm inside. Become. Since the surface state is roughened by irradiating a laser to the portion where the load is applied, the cutting force is reduced, or a minute crack is generated in the cutting blade 9 portion during cutting. When cutting was performed in this state, there was a problem of inducing defects. In addition, when a minute crack occurs in the cutting edge 9 portion, there is also a problem that the finished surface roughness of the work material is deteriorated.
[0011]
An object of the present invention is to solve such problems and to provide a throw-away tip capable of forming a sensor line without roughening the surface of the cutting edge portion.
[0012]
Another object of the present invention is to provide a throw-away tip that eliminates the possibility of a chipping portion being easily damaged by forming a sensor line.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 has a substantially flat base material, Said A rake face is formed on one principal surface side of the base material, a seating surface on the other principal surface side, and a flank face on a side surface intersecting with the rake face, and the rake face and the flank face are formed. Intersection In the throw-away tip with a cutting edge formed in By laser irradiation to the area containing the cutting edge A sensor line made of a conductive film having a predetermined width partitioned by an upper side and a lower side is provided in an electrically insulated state with respect to the base material, and the lower side of the sensor line The The intersection ridge along The sensor line is formed on the flank. of Upper side The The intersection ridge Apart from the above It is formed on the rake face side.
[0014]
In the throw-away tip according to claim 2, the prismatic tip has a substantially prismatic shape. Base material On the upper surface side of at least one end of Rake face On the end face side Front flank , And side flank on the side Respectively Formed between this rake face and the front flank face. Intersection The front cutting edge has a rake face and a side flank face. Intersection In the throw-away tip formed with a horizontal cutting edge, Front cutting edge When Laser irradiation on the area including the horizontal cutting edge A sensor line made of a conductive film having a predetermined width partitioned by an upper side and a lower side is provided in an electrically insulated state with respect to the base material, and the lower side of the sensor line is The front flank and the side flank along the intersection Formed on the upper side of the cutting edge of the sensor line The Said Apart from the intersection ridges It is formed on the rake face side.
[0015]
In addition, according to the throw-away tip according to claim 3, it has a substantially plate shape. Base material A pair of rake face and flank formed adjacent to each other in the circumferential direction is formed on the outer peripheral surface of the rake face or a plurality of pairs along the circumferential direction. Intersection In each of the throw-away inserts each having a cutting edge in the thickness direction, Laser irradiation on the area including the cutting edge A sensor line made of a conductive film having a predetermined width partitioned by an upper side and a lower side is provided in an electrically insulated state with respect to the base material, and the lower side of the sensor line The The intersection Along the ridge Formed on the flank, the sensor line Upper side The intersection Apart from the ridge It is formed on the rake face side.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the invention will be described with reference to the drawings.
[0017]
FIG. 1A is a perspective view of a throw-away tip 1 according to an embodiment of the present invention when viewed from the front upper side, and FIG. 1B is a perspective view of the throw-away tip 1 viewed from the front lower side. is there. The throw-away tip 1 has a base plate 2 having a substantially flat plate shape (substantially rectangular parallelepiped shape). Although the base material 2 is not originally distinguished from upper and lower, for convenience of explanation, one will be described below with the upper surface as the upper surface and the other as the lower surface.
[0018]
A rake face 5 is formed on the upper surface of the base material 2, and a lower surface of the base material 2 is a seating surface 6. Further, flank surfaces 8 are formed on the four side surfaces of the base material 2, respectively. A cutting edge ridge 9 is formed by the intersecting ridge of the rake face 5 and each flank face 8. Furthermore, the intersection of the rake face 5 and the two adjacent flank faces 8 forms a corner that can be used for cutting.
[0019]
In the center of the base material 2, a clamp hole 11 penetrating from the upper surface to the lower surface is formed. The throw-away tip 1 is attached to a holder or the like when a clamp screw is screwed into the clamp hole 11. In the mounted state, for example, the upper cutting edge 9 in FIG. 1A is used for cutting. Further, when the clamp screw is loosened and the throw-away tip 1 is rotated 90 ° around the clamp hole 11, the cutting edge 9 of another corner portion can be used for cutting. In this way, by rotating the throw-away tip 1 by 90 °, the four corners on the upper surface side can be used sequentially for cutting.
[0020]
Further, by turning the throw-away tip 1 upside down and mounting it on a holder or the like, the four corner portions on the lower surface side in FIGS. 1A and 1B can be used for cutting in order. When the lower surface side corner portion is used, the upper surface serves as a seating surface and the lower surface functions as a rake surface. In this way, the throw-away tip 1 can use each of the eight corner portions of the rectangular parallelepiped base material 2 for cutting.
[0021]
For this reason, each of the eight corners is provided with a sensor line 12 of a conductive film extending along the cutting edge ridge 9.
[0022]
The sensor line 12 is made of a conductive film having a predetermined width partitioned by an upper side U and a lower side L. The upper side of the cutting edge portion of the sensor line 12 is provided on the rake face 5 side of the intersecting ridge, as shown in an enlarged view in FIG.
[0023]
In cutting, for example, when 0.2 mm per rotation, the cutting resistance is applied 0.2 mm inside from the cutting edge ridge line of the chamfer part of the cutting edge. Therefore, the upper side U of the sensor line may be patterned by irradiating a laser further on the inner side than the portion where the cutting resistance is applied in consideration of the cutting feed amount.
[0024]
As described above, when the upper side U of the cutting edge 9 portion of the sensor line 12 is provided on the rake face 5 side with respect to the intersecting ridge, the laser light is cut when the sensor line 12 is patterned by laser scanning as described later. Since the blade 9 portion is not irradiated, the cutting blade 9 portion can be prevented from being roughened by the laser beam.
[0025]
If the sensor line 12 of the cutting edge 9 is formed on the rake face 5 side, the signal will not be received even if the sensor line 12 on the flank face 8 side is disconnected. Rake face 5 Although there is a concern that the disconnection signal cannot be confirmed by bypassing the side, in actual cutting processing, chips are discharged from the rake face 5 portion, so that the sensor line 12 of the rake face 5 is first worn and then escaped. The sensor line 12 of the surface 8 is worn, and there is no problem in accurate wear detection of the cutting blade 9 portion.
[0026]
Further, the lower side L of the sensor line 12 is provided on the flank 8 so as to be substantially parallel to the intersection ridge between the rake face 5 and the flank 8. That is, the lower side L of the sensor line 12 coincides with the life reference amount of the corner portion (the wear limit of the flank 8). Normally, the life reference amount of the corner portion of this type of throw-away tip 1 is in the range of 0.05 to 0.7 mm, so that the lower side L of the sensor line 12 is also at a position equal to the life reference amount. To form.
[0027]
For example, when the wear of the flank 8 of the throw-away tip 1 reaches a lifetime of 0.2 mm, the width W of the flank 8 portion of the sensor line 12 is also set to 0.2 mm. When cutting is performed by the corner portion, wear of the cutting edge ridge 9 and the flank 8 proceeds with an increase in processing time. As wear of the flank 8 progresses, the sensor line 12 wears accordingly. When the wear width of the flank 8 reaches the life reference amount or more, the sensor line 12 having the lower side L corresponding to the life reference amount is disconnected due to wear. Since the resistance value at both ends of the sensor line 12 is measured by an external circuit as will be described later, the cutting edge ridge 9 of the corner portion has reached the end of its life when the resistance value of the sensor line 12 becomes infinite. Can be determined.
[0028]
As shown in FIG. 1B, the seating surface 6 is provided with two contact regions 13 and 14 that make a pair. The two contact regions 13 and 14 are formed of a conductive film and are provided in an insulated state with respect to the base material 2. The contact regions 13 and 14 are regions that can be electrically connected to, for example, a resistance value detection circuit provided outside the holder. As will be described later, when the throw-away tip 1 is attached to the holder, the probe of the detection circuit provided on the tip seat of the holder is electrically connected to the contact regions 13 and 14.
[0029]
Connection lines 15 and 16 are provided from the flank 8 to the seating surface 6 of the base material 2 in an insulated state from the base material 2 by a conductive film. The connection line 15 electrically connects one end 121 of the sensor line 12 and one contact region 13, and the connection line 16 electrically connects the other end 122 of the sensor line 12 and the other contact region 14. To connect to.
[0030]
A connection line 15 connected to one end 121 of the sensor line 12 has a folded line 17 at a part thereof. The folding line 17 is connected to one end 121 of the sensor line 12 at the folding part 18. The folding line 17 extends in parallel with the lower side L of the sensor line 12 at a predetermined interval from the sensor line 12. By forming one end of the connection line 15 as a folding line 17, the connection line 15 and the connection line 16 can be provided on the relief surface 8 in parallel at a predetermined interval, and the connection lines 15 and 16 are arranged with high area efficiency. There is an advantage that you can.
[0031]
The two connection lines 15 and 16 formed on the flank 8 are not perpendicular to the sensor line 12 (in other words, to the cutting edge 9), but in a direction intersecting at a predetermined inclination angle. It is an inclined line that extends. This is because the arrangement positions of the contact areas 13 and 14 provided on the seating surface 6 that is the lower surface and the arrangement positions of the contact areas l3 and 14 provided on the upper surface are exactly the same.
[0032]
FIG. 3 is a schematic perspective view showing a state in which the throw-away tip 1 shown in FIGS. 1A and 1B is mounted on a holder.
[0033]
A tip mounting pocket 21 is formed at the tip of the holder 20. The bottom surface of the pocket 21 is a chip seat 22. Further, the side surface of the pocket 21 is in contact with the side surface of the chip and serves as a restraining surface 23 for restraining the chip. The throw-away tip 1 is stored in the pocket 21, and the seating surface 6 is brought into contact with the tip seat 22. Further, the side surface is brought into contact with the restraining surface 23. A clamp screw 24 is inserted from above into the clamp hole 11 of the throw-away tip 1, and its tip is screwed into a screw hole 25 formed in the center of the tip seat 22. As a result, the throw-away tip 1 is attached to the holder 20.
[0034]
A pair of probes 26 and 27 protrude from the tip seat 22 at positions facing the contact areas 13 and 14 connected to the sensor line 12 provided in the corner portion used for cutting the mounted throw-away tip 1. It is installed. The probes 26 and 27 are elastically biased upward and protrude from the tip seat 22 by, for example, several mm. When the throw-away tip 1 is mounted in the pocket 21, the probes 26 and 27 are pushed down by the seating surface 6 of the throw-away tip 1, and the upper ends thereof are flush with the tip seat 22. At this time, the upper ends of the probes 26 and 27 are in electrical contact with the contact areas 13 and 14 provided on the seating surface 6 of the throw-away tip 1.
[0035]
As shown by the alternate long and short dash lines, the probes 26 and 27 are connected to lead wires 28 laid in the holder 20, and the lead wires 28 are connected to a resistance value detection circuit 29 such as an ohmmeter.
[0036]
Therefore, the resistance value of the sensor line 12 provided in the corner portion 10 used for cutting the throw-away tip 1 mounted in the pocket 21 can be measured by the detection circuit 29.
[0037]
Next, the base material of the throw-away chip according to the present invention, the material of the sensor line, the contact area, the connection line, etc., and the manufacturing method will be described.
[0038]
As the base material of the throw-away tip, alumina sintered body, silicon nitride sintered body, cermet, cemented carbide, cubic boron nitride sintered body (CBN / cubic Boron Nitride), diamond sintered body (PCD) / Polycrystalline Diamond) or the like can be used.
[0039]
As an alumina sintered body, ZrO ₂ 2 to 30 wt%, at least one of Fe, Ni and Co oxides 0.01 to 5 wt%, the balance being Al ₂ O _Three In addition, an alumina sintered body made of inevitable impurities can be used.
[0040]
The silicon nitride sintered body includes 85 to 96 mol% of silicon nitride, 1 to 5 mol% of Group 3a element in the periodic table in terms of oxide, and impurity oxygen of SiO2. ₂ It is contained at a rate of 3 to 10 mol% in terms of conversion, and the aluminum compound content is oxide (Al ₂ O _Three ) 1% by weight or less in terms of conversion.
[0041]
The cermet contains 50 to 80% by weight of Ti in terms of carbide, nitride or carbonitride, and contains Group 6a element of the periodic table in a proportion of 10 to 40% by weight in terms of carbide (nitrogen / carbon + nitrogen). TiCN group cermet comprising 70 to 90% by weight of a hard phase component having an atomic ratio in the range of 0.4 to 0.6 and 10 to 30% by weight of a binder phase component comprising an iron group metal, etc. is there.
[0042]
Examples of the cemented carbide include those composed of a hard phase and a binder phase, and the hard phase is tungsten carbide, or 5 to 15% by weight of tungsten carbide, carbides of the metals in groups 4a, 5a, and 6a of the periodic table. The binder phase is mainly composed of an iron group metal such as Co, and is contained in a total amount of 5 to 15% by weight, for example.
[0043]
The sensor line 12 formed on the cutting edge portion of the throw-away tip itself has a predetermined electric resistance value. By measuring the change in the electrical resistance value with an ohmmeter, it is possible to detect the degree of wear of the throw-away tip and the presence or absence of a defect.
[0044]
The sensor line 12 is made of 4a, 5a, 6a group metals such as Ti, Zr, V, Nb, Ta, Cr, Mo, W, iron group metals such as Co, Ni, Fe, or metal materials such as Al, TiC, VC, NbC, TaC, Cr _Three C ₂ , Mo ₂ C, WC, W ₂ C, TiN, VN, NbN, TaN, CrN, TiCN, VCN, NbCN, TaCN, CrCN, 4a, 5a, 6a group metal carbide, nitride, carbonitride, (Ti, Al) N, etc. The
[0045]
Among these, TiN has a strong bonding force to the base material of the throw-away tip, does not react with the work material, the electric resistance value of the sensor line 12 always shows a predetermined value, the wear degree of the throw-away tip, and the occurrence of defects It is possible to accurately detect the presence / absence of a defect, to effectively prevent the formation of scratches due to reaction products on the processed surface of the work material, and to provide excellent resistance to oxidation and the electric resistance of the sensor line 12 due to oxide generation. It can be suitably used for reasons such as no change in value, the degree of wear of the throw-away tip, and the presence / absence of occurrence of defects can be accurately detected.
[0046]
The sensor line 12 is made as follows. First, a conductive film having a predetermined thickness is deposited on almost the entire surface of the base material of the throw-away chip by employing a CVD method, a PVD method such as ion plating, sputtering, vapor deposition, or a plating method. Thereafter, the conductive film is processed into a predetermined pattern by laser processing.
[0047]
If the conductive film is thin with a thickness of less than 0.05 μm, the bonding to the surface of the base material becomes weak and the electrical resistance value of the sensor line 12 increases, so that the degree of wear or chipping of the throw-away tip can be accurately detected. There is a risk that it will be difficult to do. If a conductive film exceeding 20 μm is formed, a large stress is generated inside the conductive film at the time of formation and remains, and the residual stress weakens the bonding of the conductive film to the surface of the base material. There is a risk that
[0048]
Conductive films such as TiN, (Ti, Al) N, and (Ti, Al) CN deposited on the surface of the base material of the throw-away chip are connected to the sensor line 12, the contact regions 13, 14 by laser processing or the like. It is processed into a predetermined pattern such as lines 15 and 16. In the case of processing into a predetermined pattern by laser processing, a YAG laser with a wavelength of 1.06 μm is applied to TiN or the like deposited on the surface of the base material with a width of 50 μm at an output of 35 kHz and 10 A, and a drawing speed of 100 to 300 mm / s. By scanning with irradiation, or by CO ₂ This is performed by irradiating and scanning a laser with an output of 20 W at an irradiation area diameter of 0.3 mm and a drawing speed of 0.3 m / min.
[0049]
When the base material of the throw-away chip is formed of an insulator such as an alumina sintered body, a silicon nitride sintered body, or cBN, the sensor line 12 and the like are directly formed on the surface thereof. When the base material is formed of a conductive material such as cemented carbide or cermet, the base material is formed with an intermediate layer made of an insulator such as alumina interposed therebetween.
[0050]
The intermediate layer made of an insulator such as alumina functions to make the sensor line and the like electrically independent. The intermediate layer is formed with a predetermined thickness between the surface of the base material and the sensor line or the like (conductive film) by employing a method such as a CVD method.
[0051]
When the intermediate layer is made of alumina, the intermediate layer is formed by placing the base material of the throw-away tip in a heat-resistant alloy reaction vessel set at a temperature of about 1050 ° C. and a pressure of 6.5 kPa. To do. Next, H in the reaction vessel ₂ 40-50 l / min, CO ₂ 1-3 l / min, AlCl _Three 0.5-2 l / min for 2 hours, Al ₂ O _Three And is applied to the surface of the base material.
[0052]
Further, if the thickness of the intermediate layer is less than 1 μm, an electrical short circuit occurs between the base material and the sensor line, etc., and it is possible to accurately detect the degree of wear and the chipping of the throw-away tip by the sensor line. There is a risk that it will not be possible. Further, if an intermediate layer exceeding 10 μm is formed, stress is generated and remains in the intermediate layer during the formation, and the residual stress weakens the bonding strength of the intermediate layer to the base material, and even when a small external force is applied. There is a risk that the intermediate layer is easily peeled off from the surface of the base material. Therefore, the intermediate layer preferably has a thickness in the range of 1 μm to 10 μm.
[0053]
4 (a), (b), (c), (d), and (e), examples of various shapes of the throw-away tip to which the present invention can be applied are respectively a plan view and a front view (on the front side). (Side view)
[0054]
FIG. 4A shows the throw-away tip having the shape described in FIG. 1 and the base material having a substantially square planar shape.
[0055]
FIG. 4B shows a throw-away tip whose base material has a regular triangle shape, and this tip can use three corner portions on the upper surface and the lower surface for cutting. That is, there are a total of six corner portions, each provided with a sensor line, and a contact area corresponding to each sensor line is provided on the seating surface.
[0056]
FIG. 4C shows a chip whose base material has a rhombus shape in plan view. In the throw-away tip shown in FIG. 4 (c), four acute corner portions positioned diagonally are used for cutting.
[0057]
FIG. 4D is a throw-away tip formed of a base material having an equilateral triangle in plan view, as in FIG. 4B. FIG. 4D is a throw-away tip in which only one side called a so-called positive type is used for cutting, unlike FIGS. 4A to 4C. This chip has a rake face on the upper surface and a seating surface on the lower surface, and cannot be used upside down. Three corners on the upper surface are used for cutting. For this reason, sensor lines are provided in the three corner portions. A contact area is provided on the lower seating surface, and a connection line is provided on the side relief surface.
[0058]
FIG. 4 (e) shows a threaded tip made of a base material having a substantially triangular planar shape. In this thread cutting tip, a cutting blade for turning the thread groove is provided near the top of the triangle.
[0059]
In addition to the shapes described above, the present invention can also be applied to, for example, a throwaway tip having a round or elliptical plan shape, or a grooving tip.
[0060]
In each of these chips, a sensor line made of a conductive film having a predetermined width divided by an upper side and a lower side is provided in the cutting edge portion in an electrically insulated state with respect to the base material, and the lower side of the sensor line is The flank is formed so as to be substantially parallel to the intersection ridge between the rake face and the flank, and the upper side of the cutting edge portion of the sensor line is formed on the rake face side of the intersection ridge.
[0061]
When the present inventors conducted a cutting test, in the case where the sensor line was patterned by irradiating the cutting edge portion with a laser as in the past, 5 out of 100 pieces were defective in the cutting edge portion. In the case where the upper side of the sensor line was provided on the rake face as in the present invention, none of the 100 lines were defective.
[0062]
FIG. 5 is a view showing an embodiment of a throw-away tip according to claim 2. This throw-away tip is used for grooving. In this throw-away tip, a rake face 5 is formed on the upper surface side of both ends of the substantially prismatic chip body 1, a front flank face 8a is formed on the end face side, and a lateral flank face 8b is formed on the side face side. A front cutting edge 9a is formed at the ridge line portion between the front flank 8a and a side cutting edge 9b is formed at the ridge line portion between the rake face 5 and the side flank 8b.
[0063]
A sensor line 12 made of a conductive film having a predetermined width defined by an upper side and a lower side extending along the front cutting edge 9a portion and the horizontal cutting edge 9b portion is provided in an electrically insulated state with respect to the base material. . The lower side L of the sensor line 12 is formed on the flank so as to be substantially parallel to the ridge line portion. The upper sides U of the cutting edge portions 9a and 9b of the sensor line 12 are formed on the rake face 5 side with respect to the ridge line portion.
[0064]
In this throw-away chip, one connection region 13 is provided on the upper surface side of the chip body 1, and the other connection region (not shown) is provided on the back surface side of the chip body 1, and the sensor line 12 and these connection regions Are connected by connection lines 15 and 16.
[0065]
FIG. 6 is a view showing an embodiment of a throw-away tip according to a third aspect. This throw-away tip is also used for grooving. In this throw-away tip, three pairs of the rake face 5 and the flank face 8 formed adjacent to each other in the circumferential direction are formed on the outer peripheral surface of the chip body 1 that has a substantially plate shape as a whole. A cutting edge 9 in the thickness direction is formed at each intersection of the rake face 5 and the flank face 8.
[0066]
A sensor line 12 made of a conductive film having a predetermined width defined by the upper side U and the lower side L is provided in the cutting blade 9 portion in an electrically insulated state with respect to the base material. The lower side L of the sensor line 12 is formed on the flank 8 so as to be substantially parallel to the intersection position. The upper side U of the cutting line 9 portion of the sensor line 12 is formed on the rake face 5 side from the intersecting position.
[0067]
Also in this throw-away chip, one connection region 13 is provided on the upper surface side of the chip body 1, and the other connection region (not shown) is provided on the back surface side of the chip body 1, and the sensor line 12 and these connection regions Are connected by connection lines 15 and 16.
[0068]
The embodiments of each invention have been described specifically and in detail. However, the present invention is not limited to such embodiments, and various modifications can be made within the scope of the claims.
[0069]
【The invention's effect】
As described above, the throw-away tip according to claim 1 has a substantially flat base material, Said A rake face is formed on one principal surface side of the base material, a seating surface on the other principal surface side, and a flank face on a side surface intersecting with the rake face, and the rake face and the flank face are formed. Intersection In the throw-away tip with a cutting edge formed in By laser irradiation to the area containing the cutting edge A sensor line made of a conductive film having a predetermined width partitioned by an upper side and a lower side is provided in an electrically insulated state with respect to the base material, and the lower side of the sensor line The The intersection ridge along The sensor line is formed on the flank. of Upper side The The intersection ridge Apart from the above Since it is formed on the rake face side, the surface of the cutting edge portion is not roughened when forming the sensor line, and it is possible to eliminate as much as possible that the cutting edge portion is likely to be damaged.
[0070]
The inventions according to claims 2 and 3 have the same effects as the invention according to claim 1.
[Brief description of the drawings]
FIG. 1A is a perspective view of a throw-away tip according to an embodiment of the present invention as viewed from the front upper side, and FIG. 1B is a perspective view of the throw-away tip as viewed from the front lower side.
FIG. 2 is an enlarged view showing a cutting edge portion of a throw-away tip according to an embodiment of the present invention.
FIG. 3 is a schematic perspective view showing a state in which the throw-away tip according to the embodiment of the present invention is attached to a holder.
4A to 4E are a plan view and a front view showing examples of various shapes of the throw-away tip to which the present invention can be applied, respectively.
5A and 5B are diagrams showing an embodiment of a throw-away tip according to claim 2, wherein FIG. 5A is a diagram showing a plan view, FIG. 5B is a diagram showing a side view, and FIG. It is a figure which shows the state seen from the end surface.
6A and 6B are diagrams showing an embodiment of a throw-away tip according to claim 3, wherein FIG. 6A is a diagram showing a side view, and FIG. 6B is a diagram showing a plan view.
FIG. 7 is a view showing a conventional throw-away tip.
[Explanation of symbols]
1: throwaway tip, 2: base material, 5: rake surface, 6: seating surface, 8: flank surface, 9: cutting edge, 10: corner portion, 12, 123, 125: sensor line, 13, 14: Contact area, 15, 16: connection line, 17: folding line, 18: folding part

Claims (6)

Has a substantially flat base member, said rake surface on one main surface side of the base material, to form a flank on a side surface intersecting the other seating surface on the main surface side, and the rake face, said rake face In the throw-away tip where the cutting edge is formed at the crossing ridge with the flank,
In the region including the cutting edge, a sensor line made of a conductive film having a predetermined width partitioned by an upper side and a lower side by laser irradiation is provided in an electrically insulated state with respect to the base material. A throw-away tip , wherein a lower side of a line is formed on the flank along the intersecting ridge, and an upper side of the sensor line is formed on the rake face side apart from the intersecting ridge. Substantially prismatic upper surface side rake face of the at least one end portion of the base material, surface relief before the end face side, and the lateral flank is formed respectively on the side surface side, switching before the intersection ridge between the rake face and front flank In the throw-away tip where the blade is formed with a horizontal cutting edge at the intersection of the rake face and the side flank face,
A sensor line made of a conductive film having a predetermined width divided by an upper side and a lower side by laser irradiation is provided in an area including the front cutting edge and the horizontal cutting edge in an electrically insulated state with respect to the base material. A lower side of the sensor line is formed on the front flank and the side flank along the intersecting ridge, and an upper side of the cutting edge portion of the sensor line is separated from the intersecting ridge and is on the side of the rake face A throw-away tip that is formed in A pair of rake faces and flank faces formed adjacent to each other in the circumferential direction on the outer peripheral surface of the base material having a substantially plate shape is formed as a pair or a plurality of pairs along the circumferential direction. In the throw-away tip in which the cutting edge in the thickness direction is formed at the intersection ridge with the flank,
In the region including the cutting edge, a sensor line made of a conductive film having a predetermined width partitioned by an upper side and a lower side by laser irradiation is provided in an electrically insulated state with respect to the base material. A throw-away tip , wherein a lower side of a line is formed on the flank along the intersecting ridge, and an upper side of the sensor line is formed on the rake face side apart from the intersecting ridge . The throw-away tip according to claim 1 or 2, wherein the sensor line is formed in a region including a corner portion. In the manufacturing method of the throw-away tip provided with a sensor line for detecting wear of the cutting blade,
  Depositing a conductive film on almost the entire surface of the base material;
  By laser processing, the lower side of the sensor line is formed on the flank along the intersecting ridge, and the upper side of the sensor line is formed on the rake face side away from the intersecting ridge. And a step of removing the conductive film. The throw away according to claim 5, wherein the base material is formed of a conductive material, and an intermediate layer made of an insulating material is provided between the base material and the conductive film. Chip manufacturing method.

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