JP4959458B2 - Cutting tool and cutting method - Google Patents

Description

  The present invention relates to a cutting tool and a cutting method used for cutting metal parts and the like.

  2. Description of the Related Art Conventionally, a cutting tool having a structure shown in FIG. FIG. 8 is a partial perspective view showing a conventional cutting tool in which the cutting insert is removed from the tool holder body.

  As shown in FIG. 8, the conventional cutting tool 101 includes an upper jaw 109, a lower jaw 110, and a holding portion 111 that is located on the rear end side of the upper jaw and the lower jaw and holds the upper jaw 109 and the lower jaw 110. And a cutting insert 104 that is detachably disposed between the upper jaw portion 109 and the lower jaw portion 110. The cutting insert 104 is attached to the tool holder 112 so that the rear end surface 105 faces the holding portion 111. A first relief portion 123 is formed in the vicinity of the upper jaw portion 109 of the holding portion 111, and a second relief portion 124 is formed in the vicinity of the lower jaw portion 110 of the holding portion 111. The concave surface of the first relief portion 123 is from the first corner portion 106 located between the upper surface 102 and the rear end surface 105 of the cutting insert 104, and the concave surface of the second relief portion 124 is the lower surface 103 and the rear end surface of the cutting insert 104. The second corner 107 located between the second corner 107 and the second corner 107 is separated from the second corner 107. The first relief portion 123 and the second relief portion 124 are divided by a contact surface 113 that contacts the rear end surface 105 of the cutting insert 104. A cutting edge 108 is formed at the tip of the cutting insert 104, and cutting can be performed by bringing the cutting edge 108 into contact with a rotating workpiece (see, for example, Patent Document 1).

Further, in the above cutting insert, in order to avoid interference between the tool holder 112 and the first corner portion 106 and the second corner portion 107 and to reduce stress concentration during the cutting process, the tool holder 112 has the first corner portion. A first relief portion 123 that is separated from the portion 106 and a second relief portion 124 that is separated from the second corner portion 107 are formed.
Special Table 2002-536191 gazette

  When performing cutting using the grooving tool as described above, the force applied to the cutting edge is not constant during cutting, and cutting is performed while fluctuating discontinuously depending on the behavior of the generated chips. Is called. At that time, stress that is not constant over a long period of time is repeatedly applied from the rear end portion of the cutting insert to the upper jaw portion, the lower jaw portion, and the holding portion in the vicinity of the escape portion of the tool holder. At this time, the escape portion receives force from the upper jaw portion and the lower jaw portion, and the opening end portion that is one end and the other end of the escape portion is pushed and spread. As a result, stress concentrates on the concave surface of the relief portion, and as a result, the tool holder has a problem that the upper jaw portion and the lower jaw portion are cracked starting from the relief portion and are damaged from the location.

  In view of the above-mentioned problems, the object of the present invention is to reduce the stress applied to the relief part of the tool holder during cutting, thereby suppressing the occurrence of cracks in the upper jaw part and the lower jaw part and the breakage of the tool holder. To provide a high cutting tool and a cutting method using the cutting tool.

  The invention according to claim 1 of the present invention includes a cutting insert, an upper jaw and a lower jaw holding the upper and lower surfaces of the cutting insert, and a tool holder including a holding portion holding the upper jaw and the lower jaw. The cutting insert has a rear end surface arranged so as to face the holding portion, and a first corner between the upper surface and the rear end surface, and the lower surface and the lower end surface. Each of the holding portions of the tool holder has a relief portion having a concave surface separated from at least one of the first corner portion and the second corner portion. The cutting insert is in contact with at least two of the upper surface, the lower surface, and the rear end surface, is in contact with the concave surface of the relief portion, and receives a repulsive force by receiving pressure from the cutting insert and the concave surface. Resulting arrangement Characterized in that it comprises a member.

  In the above invention, it is preferable that the arrangement member is separated from the first corner and the second corner.

  Moreover, the said invention WHEREIN: It is preferable that the said holding | maintenance part of the said tool holder has a contact surface contact | abutted with the said rear end surface of the said cutting insert.

  In the above invention, the escape portion includes a first relief portion having a concave surface spaced from the first corner portion and a second relief portion having a concave surface spaced from the second corner portion. It is preferable.

  Further, in the above invention, as the arrangement member, a first arrangement member that is in contact with the upper surface and the rear end surface of the cutting insert and is in contact with a concave surface of the first relief portion, the lower surface of the cutting insert, and the It is preferable that the cutting tool has at least one of the second disposing members in contact with the rear end surface and in contact with the concave surface of the second relief portion.

  Moreover, in the said invention, it is preferable that the said arrangement | positioning member is fixed to at least one location of the concave surface of the said escape part.

  Moreover, in the said invention, the cross-sectional shape of the said arrangement | positioning member in the case of cut | disconnecting in the plane which passes along the said upper surface and lower surface of the said cutting insert along the longitudinal direction of the said tool holder is the concave shape opened toward the said cutting insert. It is preferable to make it.

The invention according to claim 9 of the present invention includes a cutting insert, and a tool holder including an upper jaw and a lower jaw holding the upper and lower surfaces of the cutting insert, and a holding portion holding the upper jaw and the lower jaw. The cutting insert has a rear end surface arranged to face the holding portion, a first corner between the upper surface and the rear end surface, the lower surface and the rear Each having a second corner between the end surface, the holding portion of the tool holder has a relief portion having a concave surface spaced from at least one of the first corner and the second corner, Arranged between the cutting insert and the relief portion to relax the force applied from the cutting insert so that the opening end which is one end and the other end of the relief portion is pushed and widened at the time of cutting. It is characterized by having a member Cutting tool to be.

  The cutting method of the present invention is a cutting method of cutting a work material using any one of the above-described cutting tools, a proximity step of relatively bringing a cutting tool closer to the work material, and the work material A cutting step of rotating the material, bringing the cutting edge into contact with the surface of the work material and cutting the surface of the work material, and a separation step of relatively moving the work material and the cutting tool away from each other, It is characterized by providing.

  The cutting tool of the present invention can relieve the stress applied to the escape portion by opposing the repulsive force generated in the arrangement member to the stress applied to the escape portion from the cutting insert during the cutting process. As a result, it is possible to provide a cutting tool with higher durability by suppressing the generation and breakage of cracks in the escape portion.

  In addition, the cutting method using the cutting tool of the present invention relieves stress applied to the relief portion from the cutting insert during cutting, and can prevent damage to the tool holder. Cross cutting can be performed stably.

  The cutting tool of the present invention has a cutting insert detachably attached to a tool holder, and is used for grooving or parting off.

  Embodiments of a cutting tool of the present invention will be described below with reference to the drawings.

  In the tool holder 212 according to each embodiment of the present invention, among the portions that sandwich the cutting insert 204, the side that contacts the upper surface 202 of the cutting insert is the upper jaw portion 209, and the side that contacts the lower surface 203 is the lower jaw portion 210. . 2, 4, and 6, the boundary between the holding part 211 and the upper jaw part 209 and the boundary between the holding part 211 and the lower jaw part 210 are indicated by alternate long and short dash lines.

  FIG. 1 is a partial perspective view of a cutting tool according to a first embodiment of the present invention, with a cutting insert removed from a tool holder body. FIG. 2 is a partial side view showing the cutting tool shown in FIG. 1 and a state in which the cutting insert is mounted on the tool holder.

  As shown in FIGS. 1 and 2, the cutting tool 201 includes a cutting insert 204 and a tool holder 212, and the tool holder 212 has an upper surface 202 and a lower surface 203 of the cutting insert 204 at the upper jaw portion 209 and the lower jaw portion 210. And pinching. The cutting insert 204 is attached to the tool holder 212 such that the rear end face 205 faces the holding portion 211. An escape portion 220 is formed in the holding portion 211 of the tool holder 212 from the vicinity of the upper jaw portion 209 to the vicinity of the lower jaw portion 210. The concave surface 221 of the relief portion 220 includes a first corner portion 206 positioned between the upper surface 202 and the rear end surface 205 of the cutting insert 204, and a second corner positioned between the lower surface 203 and the rear end surface 205 of the cutting insert 204. It is separated from the part 207. The cutting tool 201 includes an arrangement member 222. The arrangement member 222 is in contact with the three surfaces of the upper surface 202, the lower surface 203, and the rear end surface 205 of the cutting insert 204, and is in contact with the concave surface 221 of the escape portion 220. Yes.

  At the time of cutting, the cutting insert 204 vibrates, and a force is applied in a direction in which the open end portions 229 of the escape portion 220 are expanded. At this time, pressure is also applied to the disposing member 222 from a position where it contacts the cutting insert 204. The arrangement member 222 that has received the pressure is pressed against the concave surface 221 of the escape portion 220, and receives pressure as a reaction from the concave surface 221. By receiving these two types of pressure, the disposing member 222 is elastically deformed along the vibration direction of the cutting insert 204 to generate a repulsive force. The repulsive force counteracts the stress applied to the escape portion 220 from the cutting insert 204 and relaxes the stress. Thereby, the tool holder 212 can suppress the occurrence of cracks in the upper jaw portion 209 and the lower jaw portion 210 starting from the escape portion 220, and can prevent the portion from being damaged.

  In other words, the disposing member 222 is disposed between the escape portion 220 and the cutting insert 204, and relaxes the force applied to widen the distance between the opening end portions 229 of the escape portion 220 from the cutting insert 204 during the cutting process. If so, the tool holder 212 can be prevented from being damaged.

  In the present invention, the “arrangement member” is disposed between the relief portion and the cutting insert, and generates a repulsive force by receiving pressure from the cutting insert and the concave surface of the relief portion. A rubber such as an elastic member, a spring or the like is used. In addition, when these arrangement | positioning members deform | transform between a cutting insert and the concave surface of an escape part, it is preferable not to plastically deform.

  In the present embodiment, the cutting insert 204 positions the rear end surface by the tapered portion of the upper jaw portion 209. However, the embodiment of the present invention is not limited to this, and for example, the cutting insert 204 and the upper jaw portion 209. Instead of providing a taper portion, a portion that contacts the rear end surface 205 of the cutting insert 204 may be provided in the holding portion 211 instead. That is, when the cutting insert 204 is clamped, the cutting tool 201 only needs to have a structure that facilitates positioning and prevents the cutting insert 204 from shifting toward the rear end of the holding portion 211 during the cutting process. . As a result, stable cutting can be performed on the work material.

  In addition, the disposing member 222 is preferably separated from the first corner portion 206 and the second corner portion 207. Thereby, it is possible to prevent the disposing member 222 from interfering with the first corner portion 206 and the second corner portion 207 during the cutting process, and as a result, it is possible to suppress the breakage of the disposing member 222.

  Further, the holding portion 211 of the tool holder 212 is preferably formed with a contact surface that contacts the rear end surface 205 of the cutting insert 204. Thereby, positioning at the time of clamping the cutting insert 204 can be performed easily.

  Furthermore, at the time of cutting, the cutting insert 204 can be prevented from shifting toward the rear end of the holding portion 211, and stable cutting can be performed on the work material.

  The relief portion 220 is divided into a first relief portion having a concave surface separated from the first corner portion 206 and a second relief portion having a concave surface separated from the second corner portion 208, and the disposing member 222. A first disposing member that is in contact with the upper surface 202 and the rear end surface 205 and in contact with the concave surface of the first relief portion; and a second arrangement that is in contact with the lower surface 203 and the rear end surface 205 and in contact with the concave surface of the second escape portion. It is preferable that at least one of the installation members is disposed. By disposing at least one of the first disposing member and the second disposing member, at least one of stresses applied to the first relief portion and the second relief portion by the cutting insert 204 is relieved. As a result, cracks and breakage are suppressed in at least one of the first relief portion and the second relief portion, and a more durable cutting tool can be provided.

  Most preferably, the first disposing member and the second disposing member are disposed together. In this case, in the first flank and the second flank, occurrence of cracks or Breakage can be prevented.

  Furthermore, the conditions such as the shape and elastic modulus of the first arrangement member and the second arrangement member arranged in the first relief portion and the second relief portion are optimized according to each cutting tool. Thus, a more durable cutting tool can be provided.

  Moreover, it is preferable that the arrangement | positioning member 222 is being fixed to the concave surface 221 of the escape part 220 using an adhesive material, a screw member, etc. FIG. Thereby, at the time of cutting, the arrangement | positioning member 222 receives a pressure, without elastically deforming, without separating from the concave surface 221, and a repulsive force arises. As a result, the stress applied to the escape portion 220 from the cutting insert 204 can be reliably relaxed.

  In the present invention, “fixing” is performed using an adhesive, a screw member, or the like. When the arrangement member is fixed to the concave surface, the fixing portions are bonded to each other and are not separated from each other.

  Further, the cross-sectional shape of the disposing member 222 in the case of cutting along a plane passing through the upper surface 202 and the lower surface 203 of the cutting insert 204 along the longitudinal direction of the tool holder 212 forms a concave shape that opens toward the cutting insert 204. It is preferable. When cutting, the disposing member having a concave cross-sectional shape is greatly deformed and a larger repulsive force is generated as compared with the disposing member filled in the relieving portion 220. Can be effectively mitigated.

  In the first embodiment, when the tool holder 212 opens the upper jaw portion 209 and mounts the cutting insert 204, the repulsive force generated in the direction in which the upper jaw portion 209 and the lower jaw portion 210 are closed is used as a restraining force. Although the clamping method in which the cutting insert 204 is mounted in a restraint manner is used, the mode of implementation of the cutting tool according to the present invention is not limited to the above-described fixing method. For example, a cutting insert clamping method using a clamp screw member can be used.

  Hereinafter, another embodiment according to the present invention will be described with reference to the drawings.

  FIG. 3 is a partial perspective view showing a second embodiment of the cutting tool according to the present invention. FIG. 4 is a partial side view of FIG. FIG. 5 is a partial perspective view of a tool holder in the cutting tool according to the second embodiment.

  As shown in FIGS. 3 and 4, the cutting tool 201 according to the second embodiment of the present invention includes a cutting insert 204 and a tool holder 212, and the tool holder 212 includes an upper jaw 209 and a lower jaw 210. Thus, the upper surface 202 and the lower surface 203 of the cutting insert 204 are sandwiched. The cutting insert 204 is attached to the tool holder 212 such that the rear end face 205 faces the holding portion 211. The holding portion 211 is formed with a relief portion 220 including a first relief portion 223 formed in the vicinity of the upper jaw portion 209 and a second relief portion 224 formed in the vicinity of the lower jaw portion 210. The first concave surface 227 of the first relief portion 223 is from the first corner portion 206 located between the upper surface 202 and the rear end surface 205 of the cutting insert 204, and the second concave surface 228 of the second relief portion 224 is the cutting insert 204. Are separated from the second corner portion 207 located between the lower surface 203 and the rear end surface 205. The first relief portion 223 and the second relief portion 224 are divided by a contact surface 213 that contacts the rear end surface 205 of the cutting insert 204. The cutting tool 201 includes a first arrangement member 225 and a second arrangement member as the arrangement member 222. The opening of the first disposing member 225 is in contact with the upper surface 202 and the rear end surface 205, and is further in contact with the first concave surface 227 of the first escape portion 223, and the opening of the second disposing member 226 is in contact with the lower surface 203. And the rear end face 205, and is further in contact with the second concave surface 228 of the second relief portion 224. The first disposing member 225 is disposed so as not to contact the first corner portion 206 of the cutting insert 204.

  In the present embodiment, the first disposing member 225 and the second disposing member 226 are disposed in the first escape portion 223 and the second escape portion 224, respectively. The first disposing member 225 and the second disposing member 226 relieve stress applied to the respective relief portions from the cutting insert 204, thereby generating cracks or breakage in the first relief portion 223 and the second relief portion 224. Therefore, it is possible to provide the cutting tool 201 with higher durability.

  In the present embodiment, as shown in FIG. 5, a first concave surface 227 and a second concave surface 228 having no corners are formed in the first relief portion 223 and the second relief portion 224. Thereby, it can prevent that the stress concerning the 1st escape part 223 and the 2nd relief part 224 from the cutting insert 204 concentrates on one place of each concave surface, As a result, in the 1st relief part 223 and the 2nd relief part 224 The generation and breakage of cracks can be suppressed.

  As shown in FIGS. 3 and 4, the first disposing member 225 is separated from the first corner portion 206, and the second disposing member 226 is separated from the second corner portion 207. Thereby, it can prevent that the 1st arrangement | positioning member 225 interferes with the 1st corner | angular part 206 and the 2nd arrangement | positioning member 226 respectively with the 2nd corner | angular part 207 at the time of cutting, As a result, 1st arrangement | positioning The member 225 and the second disposing member 226 can be prevented from being damaged, and the stress applied to the escape portion 220 can be continuously relaxed.

  Further, a contact surface 213 that contacts the rear end surface 205 of the cutting insert 204 is formed in the holding portion 211 of the tool holder 212. This facilitates positioning when clamping the cutting insert 204, and prevents the cutting insert 204 from shifting toward the rear end of the holding portion 211 during the cutting process, and is stable with respect to the work material. Can be cut.

  As shown in FIG. 4, in this embodiment, the contact surface 213 of the tool holder 212 is in surface contact with the rear end surface 205 of the cutting insert 204. Thereby, compared with the case where it contacts two places of the upper jaw part 209 and the lower jaw part 210 like 1st embodiment, the pressure applied to the tool holder 212 from the cutting insert 204 at the time of a cutting process can be disperse | distributed more effectively. The durability of the tool holder 212 can be increased.

  Further, the cross-sectional shapes of the first arrangement member 225 and the second arrangement member 226 when cut along a plane passing through the upper surface 202 and the lower surface 203 of the cutting insert 204 along the longitudinal direction of the tool holder 212 are the cutting insert 204. The first opening member 225 and the second concave surface 227 and the second mounting member 226 and the second concave surface 228 are provided with clearances, respectively. The clearance is formed so as to increase from the depths of the first relief portion and the second relief portion toward the opening end portion, and thereby the arrangement member 222 is brought into contact with the concave surface 221 during the cutting process. The situation where the elastic deformation of the material is hindered is less likely to occur. As a result, the first disposing member 225 and the second disposing member 226 are greatly deformed and a larger repulsive force is generated during the cutting process as compared with the disposing member that is simply filled in the relief portion. The stress applied to the first relief portion 223 and the second relief portion 224 from 204 can be effectively relieved.

  Further, in the present embodiment, the first disposing member 225 is fitted to the first escape portion 223 and the second disposing member 226 is fitted to the second escape portion 224, respectively. As a result, the contact area between the disposing member 222 and the concave surface 220 increases, so that when the first disposing member 225 and the second disposing member 226 are deformed, the first disposing member 225 changes to the first concave surface 227. Such pressure and the pressure applied from the second disposing member 226 to the second concave surface 228 can be effectively dispersed. As a result, the generation and breakage of cracks in the first relief portion 223 and the second relief portion 224 can be suppressed.

  The first disposing member 225 is fixed to the first concave surface 227, and the second disposing member 226 is fixed to the second concave surface 228, respectively. Thus, during cutting, the first disposing member 225 receives pressure from the first concave surface 227 and the second disposing member 226 receives pressure without being separated from the second concave surface 227, and elastically deforms and repels as described above. Occurs. As a result, the stress applied to the first relief portion 223 and the second relief portion 224 from the cutting insert 204 can be reliably relieved.

  Further, the tool holder 212 may be provided with a slit extending from the contact surface 213 to the rear end side of the tool holder 21. In this case, when the cutting insert 204 is disposed, the vertical movement of the upper jaw 209 is facilitated, and the mounting of the cutting insert 204 is facilitated. As shown in FIG. 3, the cutting insert 204 is formed with a concave upper clamp portion 240 a on the upper surface 202 and a concave lower clamp portion 240 b on the lower surface 203. On the other hand, as shown in FIG. 5, the tool holder 212 has a convex upper jaw 241 a formed on the upper jaw 209 and a lower clamp 241 b formed on the lower jaw 210. When the insert is disposed, the upper jaw clamp portion 241a and the upper clamp portion 240a, and the lower jaw clamp portion 241b and the lower clamp portion 240b are fitted to each other, so that the cutting insert 204 is laterally displaced from the tool holder 212 during the cutting process. In addition, it is possible to perform stable cutting on the work material.

  Furthermore, by forming the upper jaw clamp portion 241a and the lower jaw clamp portion 241b, the area in which the upper jaw portion 209 and the lower jaw portion 210 are in contact with the cutting insert 204 is increased. Thereby, the pressure concerning the upper jaw part 209 and the lower jaw part 210 at the time of cutting is more effectively disperse | distributed, As a result, damage to the tool holder 212 can be suppressed.

  The tool holder 212 is provided with a clamp screw member 231, and the cutting insert 204 is mounted by tightening the clamp screw member 231. In this case, the clamp screw member 231 is preferably disposed closer to the cutting insert clamping portion. Thereby, the vibration of the tool holder 212 at the time of cutting can be relieved, and as a result, damage to the tool holder 212 can be suppressed.

  Next, a third embodiment of the cutting tool according to the present invention will be described with reference to FIG. 6 which is a partial side view thereof and FIG. 7 which shows a cross-sectional shape of an arrangement member.

  In the third embodiment of the cutting tool according to the present invention shown in FIG. 6, a clamping method is used in which the cutting insert 204 is mounted in a self-constraining manner as in the first embodiment. Specifically, the cutting insert is formed by a taper surface and a lower jaw portion in which the surface of the upper jaw portion 209 that contacts the upper surface 202 of the cutting insert 204 is inclined with respect to the surface of the lower jaw portion 210 that contacts the lower surface 203 of the cutting insert 204. 204 is restrained. Therefore, in this embodiment, only one cutting edge is formed on the cutting insert 204. Unlike the second embodiment, only one side is used for cutting. In this case, since the screw hole is not formed in the tool holder 212, the rigidity of the tool holder 212 can be increased as compared with the second embodiment in which the clamp screw member 231 is provided.

  Moreover, in this embodiment, since the contact surface 213 is not formed in the holding | maintenance part 211 of the tool holder 212, the escape part 220 is not divided like 2nd embodiment. In this case, since the radius of curvature of the concave surface 221 is larger than that in the second embodiment, the stress applied to the escape portion 220 from the cutting insert 204 is more effectively dispersed during the cutting process. Generation and breakage can be suppressed, and a more durable cutting tool can be provided.

  In addition, since the disposing member 222 fitted to the relief portion 220 in the third embodiment has a larger area in contact with the concave surface 221 than the disposing member 222 in the second embodiment, the disposing member 222 extends from the disposing member 222 to the concave surface 221. The pressure can be distributed more effectively.

  As shown in FIG. 7, in this embodiment, the disposing member 222 has a cross-sectional shape in the case of cutting along a plane passing through the upper surface 202 and the lower surface 203 of the cutting insert 204 along the longitudinal direction of the tool holder 212. It is formed from the surface 233, the outer peripheral surface 232, and the connection surface 234 that connects the inner peripheral surface 233 and the outer peripheral surface 232, and at the corner between the inner peripheral surface 233 and the connection surface 234, the cutting insert 204 is in contact with the upper surface 202 and the lower surface 203. At the time of cutting, the cutting insert 204 mainly vibrates up and down. Therefore, a strong pressure is applied to the arrangement member 222 arranged as in the third embodiment in the direction in which the interval between the openings of the arrangement member 222 is increased from the upper surface 202 and the lower surface 203 of the cutting insert 204. As a result, as described above, a strong repulsive force is generated in the arrangement member 222, and the stress applied to the escape portion 220 from the cutting insert 204 can be more effectively reduced.

  In addition, a wider clearance is formed between the concave surface 221 and the arrangement member 222 than in the second embodiment. Thereby, even when a larger pressure is applied from the cutting insert 204 during the cutting process, the disposing member 222 can be elastically deformed without being blocked by the concave surface 221. As a result, as described above, a repulsive force is generated in the arrangement member 222, and the stress applied to the escape portion 220 from the cutting insert 204 can be relieved more greatly.

  In addition, the disposing member 222 is fixed to the escape portion 220 at two locations, an upper portion of the slit 230 and a lower portion of the slit 230. When the disposing member 222 is fixed at only one place, the pressure applied from the disposing member 222 to the concave surface 221 tends to concentrate on the fixing portion at the time of cutting. In the present embodiment, since the disposing member 222 is fixed at two locations above the slit 230 and below the slit 230, the pressure applied to the fixing portion is dispersed, resulting in the occurrence of cracks in the escape portion 220, Damage can be suppressed.

  Furthermore, since the disposing member 222 is fixed at two locations on the concave surface 221, when the pressure is applied from the cutting insert 204, the stress applied to the escape portion 220 can be more reliably reduced.

  Specifically, as the radius of curvature of the concave surface 221 increases, the arrangement member 222 fixed to only one portion of the concave surface 221 moves up and down around the fixing portion when receiving pressure from the cutting insert 204. Misalignment is likely to occur. When a displacement occurs when the arrangement member 222 receives pressure, the pressure causes a displacement, but the arrangement member 222 does not effectively act as a pressure for elastically deforming the arrangement member 222 described above. 222 is not effectively repelled. On the other hand, in this embodiment, since the disposing member 222 is fixed at two positions with the slit 230 interposed therebetween, even if pressure is applied from the cutting insert 204, it is elastically deformed without being displaced and effectively repelling force. Occurs. As a result, the stress applied to the escape portion 220 from the cutting insert 204 can be reliably relaxed.

  As mentioned above, although the embodiment of the cutting tool according to the present invention has been shown by taking the cutting tool for grooving as an example, the cutting tool according to the present invention is not limited to the above embodiment and deviates from the object of the invention. Needless to say, it can be arbitrary as long as it is not.

  Next, a cutting method for cutting a work material using the cutting tool according to the present invention will be described with reference to the drawings.

  9 to 11 show process diagrams of a cutting method for cutting a work material using the cutting tool according to the present invention. First, the cutting insert 204 is attached to the tool holder 212. Then, as shown in FIG. 9, the work material 250 is rotated to bring the cutting blade 208 of the cutting tool 201 closer to the work material 250. Note that the cutting blade 208 and the work material 250 may be relatively close to each other. For example, the work material 250 may be close to the cutting tool 201.

  Next, as shown in FIG. 10, the cutting material 208 is brought into contact with the work material 250 to cut the work material 250. Thereafter, the cutting tool 201 is separated from the work material 250 as shown in FIG. In addition, when continuing a cutting process, the state which rotated the workpiece 250 and holding the cutting blade 208 of the cutting tool 201 in the different location of the workpiece 250 is repeated.

  As a result, the stress applied to the relief portion 220 of the tool holder 212 during the cutting process is alleviated, the tool holder 212 can be prevented from being damaged, and the work material is subjected to stable cutting over a long period of time. Can do.

  Although the grooving process has been described as an example of the cutting method, it can be used for other cutting processes such as an inner diameter process.

It is one Embodiment of the cutting tool which concerns on this invention, and is a partial perspective view of the state from which the cutting insert was removed from the holder main body. It is a partial side view showing one embodiment of a cutting tool concerning the present invention. It is a fragmentary perspective view which shows 2nd embodiment of the cutting tool which concerns on this invention. It is a partial side view which shows 2nd embodiment of the cutting tool which concerns on this invention. It is a fragmentary perspective view of a tool holder among the cutting tools shown in FIG. It is a partial side view which shows 3rd embodiment of the cutting tool which concerns on this invention. It is sectional drawing of an arrangement | positioning member among the cutting tools shown in FIG. It is a conventional cutting tool, and is a partial perspective view of a state where a cutting insert is removed from a tool holder body. It is process drawing of the cutting method which concerns on this invention. It is process drawing of the cutting method which concerns on this invention. It is process drawing of the cutting method which concerns on this invention.

Explanation of symbols

102 ... Upper surface 103 ... Lower surface 104 ... Cutting insert 105 ... Rear end face 106 ... First corner 107 ... Second corner 108 ... Cutting blade 109 ... Upper jaw 110 ... lower jaw part 111 ... holding part 112 ... tool holder 113 ... contact surface 120 ... relief part 123 ... first relief part 124 ... second relief part 201 ... Cutting tool 202 ... Upper surface 203 ... Lower surface 204 ... Cutting insert 205 ... Rear end face 206 ... First corner 207 ... Second corner 208 ... Cutting blade 209 ... -Upper jaw part 210 ... Lower jaw part 211 ... Holding part 212 ... Tool holder 213 ... Contact surface 220 ... Relief part 221 ... Concave surface 222 ... Arrangement member 223 ... First relief portion 224 ... second relief portion 225 ... first arrangement member 226 ... 2nd arrangement member 227 ... 1st concave surface 228 ... 2nd concave surface 229 ... Opening end 230 ... Slit 231 ... Clamp screw member 232 ... Outer peripheral surface 233 ... Inner circumference Surface 234 ... Connection surface 240a ... Upper clamp part 240b ... Lower clamp part 241a ... Upper jaw clamp part 241b ... Lower jaw clamp part 250 ... Work material

Claims (9)

Cutting inserts,
A cutting tool comprising an upper jaw and a lower jaw holding the upper and lower surfaces of the cutting insert, and a tool holder comprising a holding portion for holding the upper jaw and the lower jaw,
The cutting insert has a rear end surface disposed so as to face the holding portion, a first corner between the upper surface and the rear end surface, and a second corner between the lower surface and the rear end surface. Each has
The holding part of the tool holder has a relief part having a concave surface spaced from at least one of the first corner part and the second corner part,
Arrangement that contacts at least two of the upper surface, the lower surface, and the rear end surface of the cutting insert, contacts the concave surface of the relief portion, and generates a repulsive force by receiving pressure from the cutting insert and the concave surface. A cutting tool comprising a member.   The cutting tool according to claim 1, wherein the arrangement member is separated from the first corner and the second corner.   The cutting tool according to claim 1, wherein the holding portion of the tool holder has a contact surface that contacts the rear end surface of the cutting insert.   The first relief portion having a concave surface spaced from the first corner portion and the second relief portion having a concave surface spaced from the second corner portion as the relief portion. The cutting tool in any one of 1-3.   As the arrangement member, a first arrangement member that is in contact with the upper surface and the rear end surface of the cutting insert and is in contact with a concave surface of the first relief portion, and is in contact with the lower surface and the rear end surface of the cutting insert. 5. The cutting tool according to claim 4, comprising at least one of the second disposing members in contact with the concave surface of the second relief portion.   The cutting tool according to any one of claims 1 to 5, wherein the disposing member is fixed to at least one portion of the concave surface of the escape portion.   A cross-sectional shape of the arrangement member when cutting along a plane passing through the upper surface and the lower surface of the cutting insert along the longitudinal direction of the tool holder forms a concave shape that opens toward the cutting insert. The cutting tool in any one of Claims 1-6. Cutting inserts,
A cutting tool comprising an upper jaw and a lower jaw holding the upper and lower surfaces of the cutting insert, and a tool holder comprising a holding portion holding the upper jaw and the lower jaw,
The cutting insert has a rear end surface disposed so as to face the holding portion, a first corner between the upper surface and the rear end surface, and a second corner between the lower surface and the rear end surface. Each has
The holding part of the tool holder has a relief part having a concave surface spaced from at least one of the first corner part and the second corner part,
Arranged between the cutting insert and the relief portion to relax the force applied from the cutting insert so that the opening end which is one end and the other end of the relief portion is pushed and widened at the time of cutting. A cutting tool comprising a member. A cutting method for cutting a work material using the cutting tool according to claim 1,
A proximity step of relatively bringing a cutting tool closer to the work material;
A cutting step of rotating the work material, bringing the cutting edge into contact with the surface of the work material, and cutting the surface of the work material;
A separating step of relatively separating the work material and the cutting tool from each other.

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