WO2016208772A1 - 切削工具及び切削加工物の製造方法 - Google Patents
切削工具及び切削加工物の製造方法 Download PDFInfo
- Publication number
- WO2016208772A1 WO2016208772A1 PCT/JP2016/069045 JP2016069045W WO2016208772A1 WO 2016208772 A1 WO2016208772 A1 WO 2016208772A1 JP 2016069045 W JP2016069045 W JP 2016069045W WO 2016208772 A1 WO2016208772 A1 WO 2016208772A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insert
- cutting
- cutting tool
- holder
- peripheral side
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/22—Securing arrangements for bits or teeth or cutting inserts
- B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
- B23C5/2208—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/22—Securing arrangements for bits or teeth or cutting inserts
- B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
- B23C5/2208—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts
- B23C5/2213—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts having a special shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/04—Overall shape
- B23C2200/0416—Irregular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/28—Arrangement of teeth
- B23C2210/282—Unequal angles between the cutting edges, i.e. cutting edges unequally spaced in the circumferential direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/12—Boron nitride
- B23C2226/125—Boron nitride cubic [CBN]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/31—Diamond
- B23C2226/315—Diamond polycrystalline [PCD]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2240/00—Details of connections of tools or workpieces
- B23C2240/08—Brazed connections
Definitions
- the present disclosure relates to a cutting tool and a method for manufacturing a cut workpiece.
- a rotary cutting tool described in Patent Document 1 is known as a cutting tool used when cutting a work material such as metal.
- the cutting tool described in Patent Document 1 is a tool in which a cutting tool (cutting insert) is attached to each of a plurality of cutting tool storage grooves (insert pockets) formed on the outer periphery of a cylindrical tool body (holder).
- the cutting tool of the present disclosure is a columnar body that extends from the first end to the second end along the rotation axis, a holder having an insert pocket located on the first end side, and a position in the insert pocket, A cutting insert having a cutting edge.
- the insert pocket opens to an end surface and an outer peripheral surface located at the first end of the holder.
- the cutting insert has a first portion located on the inner peripheral side of the opening on the outer peripheral side of the insert pocket in a front view of the first end.
- part is larger than the width
- the manufacturing method of the cut workpiece according to the present disclosure includes a step of rotating the cutting tool and a step of bringing the cutting blade of the rotating cutting tool into contact with a work material.
- FIG. 1 is a perspective view illustrating a cutting tool according to an embodiment of the present disclosure.
- FIG. 2 is an enlarged view of a region A1 shown in FIG.
- FIG. 3 is a perspective view of the cutting tool shown in FIG. 1 viewed from another direction.
- FIG. 4 is an enlarged view of a region A2 shown in FIG.
- FIG. 5 is a plan view of the cutting tool shown in FIG. 1 on the first end side (tip side).
- FIG. 6 is an enlarged view of an area A3 shown in FIG.
- FIG. 7 is a side view in the B1 direction shown in FIG.
- FIG. 8 is an enlarged view of a region A4 shown in FIG.
- FIG. 9 is an enlarged view showing the same region as FIG. FIG.
- FIG. 10 is an enlarged view showing the holder in the same region as FIG.
- FIG. 11 is a perspective view of a cutting insert in the cutting tool shown in FIG.
- FIG. 12 is a side view of the first side surface (front side surface) of the cutting insert shown in FIG. 11.
- FIG. 13 is a plan view on the upper surface side of the cutting insert shown in FIG. 11.
- FIG. 14 is an enlarged view showing the same region as FIG. It is the schematic which shows 1 process of the manufacturing method of the cut workpiece which concerns on embodiment of this indication. It is the schematic which shows 1 process of the manufacturing method of the cut workpiece which concerns on embodiment of this indication. It is the schematic which shows 1 process of the manufacturing method of the cut workpiece which concerns on embodiment of this indication.
- the cutting tool 1 according to the embodiment of the present disclosure will be described in detail with reference to the drawings.
- each drawing referred to below shows only the main members in a simplified manner for the convenience of explanation. Therefore, the cutting tool of the present disclosure may include any component not shown in the drawings to which the present specification refers.
- the dimension of the member in each figure does not represent the dimension of an actual structural member, the dimension ratio of each member, etc. faithfully.
- the cutting tool 1 of the present embodiment includes a holder 3, a plurality of cutting inserts 5 (hereinafter also simply referred to as inserts 5), and a plurality of screws 7, as shown in FIGS.
- inserts 5 a plurality of cutting inserts 5
- screws 7 a plurality of screws 7, as shown in FIGS.
- the cutting tool 1 of this embodiment is equipped with the some insert 5 and the some screw 7, even if it is the structure provided with the one insert 5 and the one screw 7, there is no problem.
- the holder 3 is a columnar body that can rotate around the rotation axis X1 and extends from the first end to the second end along the rotation axis X1.
- the holder 3 in this embodiment is a substantially cylindrical body.
- the holder 3 rotates in the rotation direction X2 indicated by the arrow about the rotation axis X1.
- the center axis of the cylindrical holder 3 and the rotation axis X1 of the holder 3 coincide.
- the first end is the side where the insert 5 is located.
- the second end is a side located opposite to the first end.
- the first end is referred to as the front end
- the second end is referred to as the rear end.
- tip than a rear end is described as a front end side
- the case closer to the rear-end than a front end is described as a rear-end side.
- the side close to the rotation axis X1 is defined as the inner side or the inner peripheral side
- the side far from the rotation axis X1 is defined as the outer side or the outer peripheral side.
- FIG. 1 is a perspective view in which the rear end of the cutting tool 1 can be confirmed.
- FIG. 3 is a perspective view in which the tip of the cutting tool 1 can be confirmed.
- the holder 3 in this embodiment has a plurality of insert pockets 9 (hereinafter also simply referred to as pockets 9) located on the tip side.
- the insert 5 is detachably attached to each pocket 9. Therefore, the surface of the pocket 9 is opposed to the insert 5 via a contact or a slight gap.
- the cutting tool 1 of the present embodiment includes a plurality of inserts 5, the holder 3 has a plurality of pockets 9.
- the pocket 9 is open to the front end side and the outer peripheral side of the holder 3.
- the pocket 9 is open to the end surface and the outer peripheral surface located at the tip of the holder 3. Therefore, the pocket 9 has the 1st opening part 9a (opening part on the front end side) opening toward the front end side, and the 2nd opening part 9b (opening part on the outer peripheral side) opening toward the outer peripheral side. .
- the plurality of pockets 9 are provided at equal intervals so as to be rotationally symmetric around the rotation axis X1, but may be provided at unequal intervals. .
- the interval between the adjacent pockets 9 is constant, the variation in the cutting load applied to the insert 5 attached to each pocket 9 can be reduced.
- the holder 3 includes a plurality of chip pockets 6 adjacent to the plurality of insert pockets 9, respectively. Chips generated by the insert 5 attached to the insert pocket 9 are discharged through the chip pocket 6.
- the material of the holder 3 for example, steel, cast iron, aluminum alloy or the like can be used.
- the steel holder 3 with high strength can be used.
- the size of the holder 3 is appropriately set according to the size of the work material. For example, the length in the direction along the rotation axis X1 is set to about 30 to 90 mm, and the width (diameter) in the direction orthogonal to the rotation axis X1 is set to about 20 to 500 mm.
- the holder 3 is not a strict column shape.
- the holder 3 is not limited to a single member as in this embodiment, and may be a plurality of members. For example, you may be comprised by the fixing member which fixes the insert 5, and the main-body part holding this fixing member.
- each insert 5 is attached to each pocket 9 from a first opening 9 a that opens toward the tip side of the pocket 9.
- Each insert 5 is fixed to the pocket 9 by a screw 7. Therefore, the cutting tool 1 of this embodiment has ten screws 7 for fixing the insert 5 to the pocket 9. Needless to say, the number of pockets 9, the number of inserts 5 and the number of screws 7 are not limited to ten.
- the insert 5 in the present embodiment is a columnar body having a cutting edge 11 as shown in FIGS.
- the insert 5 has a quadrangular prism shape including a rectangular upper surface 13, a rectangular lower surface 15, and a side surface 17 positioned between the upper surface 13 and the lower surface 15.
- the upper surface 13 is positioned on the rear end side
- the lower surface 15 is positioned on the front end side.
- the side surface 17 has four surface regions of a first side surface 19, a second side surface 23, a third side surface 25, and a fourth side surface 21 corresponding to the sides of the rectangular upper surface 13 and the lower surface 15.
- the upper surface 13 is a surface located on the rear end side (upper side in FIG. 12) and comes into contact with the pocket 9 of the holder 3.
- the lower surface 15 is a surface located on the distal end side (lower side in FIG. 12), and protrudes in the distal direction from the holder 3. In the present embodiment, not the entire lower surface 15 but a part on the second side surface 23 side of the lower surface 15 partially protrudes in the distal direction from the holder 3.
- 1st side surface 19 (henceforth the front side surface 19) is a surface area
- the front side surface 19 has a long rectangular shape in a direction orthogonal to the rotation axis X1 when viewed from the front side in the rotation direction X2.
- 4th side surface 21 (henceforth the rear side surface 21) is a surface area
- FIG. The rear side surface 21 is located on the side opposite to the front side surface 19 and abuts against the pocket 9 when the insert 5 is attached to the holder 3.
- the second side surface (hereinafter referred to as the outer side surface 23) is a surface region located on the outer peripheral side of the holder 3 when the insert 5 is attached to the holder 3.
- the outer side surface 23 protrudes in the outer peripheral direction from the holder 3 when the insert 5 is attached to the holder 3.
- a part of the outer surface 23 on the lower surface 15 side protrudes in the outer peripheral direction from the holder 3 in front of the rotation direction X2.
- the third side surface (hereinafter referred to as the inner side surface 25) is a surface region located on the inner peripheral side of the holder 3 when the insert 5 is attached to the holder 3.
- the inner side surface 25 comes into contact with the pocket 9 when the insert 5 is attached to the holder 3.
- the four surface areas of the front side surface 19, the rear side surface 21, the outer side surface 23, and the inner side surface 25 are each substantially rectangular. Further, the four surface regions of the front side surface 21, the rear side surface 23, the outer side surface 25, and the inner side surface 27 have four corners at portions intersecting with other surfaces.
- the upper surface 13, the lower surface 15, the front side surface 19, the rear side surface 21, the outer side surface 23, and the inner side surface 25 may have a substantially rectangular shape, and need to have a rectangular shape in a strict sense. Absent.
- Each of the four corners may have a rounded shape when viewed from the front, and the side located so as to connect adjacent corners is not a strict linear shape, and some of the sides are uneven. It may have a shape.
- the rear side surface 21 and the inner side surface 25 abut against the pocket 9, but the entire surface does not abut against the pocket 9.
- the ridge line intersecting the rear side surface 21 and the inner side surface 25 and the ridge line intersecting the rear side surface 21 and the outer side surface 23 of the insert 5 having a quadrangular prism shape are pockets 9. And is not in contact with the surface of the pocket 9. Thereby, it can reduce that the load accompanying the cutting resistance at the time of a cutting process concentrates on the location which touches said ridgeline in the pocket 9. FIG. As a result, the durability of the holder 3 can be increased.
- the insert 5 has the cutting edge 11, and the cutting edge 11 is at least one of a ridge line where the front side surface 19 and the outer surface 23 intersect and a ridge line where the front side surface 19 and the lower surface 15 intersect.
- the first cutting edge (hereinafter referred to as the outer peripheral cutting edge 27) is located on the ridgeline where the front side surface 19 and the outer side surface 23 intersect.
- a leading edge 29 is located on the ridge line where the front side surface 19 and the lower surface 15 intersect. That is, the cutting edge 11 in the present embodiment is constituted by the outer peripheral cutting edge 27 and the tip cutting edge 29.
- the length of the outer peripheral cutting edge 27 is set to about 1 to 10 mm.
- the length of the tip cutting edge 29 is set to, for example, about 0.5 to 10 mm.
- the cutting tool 1 of the present embodiment can be used for so-called milling, in which a workpiece 3 is cut by moving the holder 3 in a direction substantially orthogonal to the rotation axis X1 while rotating around the rotation axis X1. It is.
- the outer peripheral cutting edge 27 may be used as a “main cutting edge” that mainly cuts a work material.
- the leading edge 29 may be used as a “sweeper” that reduces the unevenness of the processed surface of the work material.
- the outer peripheral cutting edge 27 and the front end cutting edge 29 are formed on the outer peripheral edge of the front side surface 19, and the front side surface 19 is located in front of the rotation direction X2. For this reason, an area functioning as a “rake face” through which chips flow when cutting is located on the front side surface 19.
- the outer peripheral cutting edge 27 is located on a ridge line where the front side surface 19 and the outer side surface 23 intersect. Therefore, a region functioning as a so-called “flank” is located on the outer surface 23. Similarly, since the front end cutting edge 29 is located at the ridge line where the front side surface 19 and the lower surface 15 intersect, a region functioning as a so-called “flank” is also located on the lower surface 15.
- Examples of the material of the insert 5 include cemented carbide or cermet.
- Examples of the composition of the cemented carbide include WC—Co, WC—TiC—Co, and WC—TiC—TaC—Co.
- WC—Co is produced by adding cobalt (Co) powder to tungsten carbide (WC) and sintering.
- WC—TiC—Co is obtained by adding titanium carbide (TiC) to WC—Co.
- WC—TiC—TaC—Co is obtained by adding tantalum carbide (TaC) to WC—TiC—Co.
- Cermet is a sintered composite material in which a metal is combined with a ceramic component.
- the cermet includes a main component of a titanium compound such as titanium carbide (TiC) or titanium nitride (TiN).
- the surface of the insert 5 may be coated with a film using a chemical vapor deposition (CVD) method or a physical vapor deposition (PVD) method.
- CVD chemical vapor deposition
- PVD physical vapor deposition
- the composition of the coating include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and alumina (Al 2 O 3 ).
- the insert 5 may have a structure in which, for example, a diamond sintered body or a CBN sintered body is brazed to a base made of the above material.
- the insert 5 of the present embodiment has a through hole 31 formed from the lower surface 15 to the upper surface 13. That is, the through hole 31 in the present embodiment extends from the lower surface 15 in the direction along the rotation axis X1. In other words, the through hole 31 in this embodiment does not open to the front side surface 19, the outer side surface 23, the rear side surface 21, and the inner side surface 25.
- the through hole 31 may be formed substantially from the lower surface 15 toward the upper surface 13 and may be inclined by about 10 ° with respect to the rotation axis X1, for example.
- the through hole 31 is a part for screwing the insert 5 to the holder 3. That is, the insert 5 is inserted into the holder 3 by inserting the screw 7 into the through hole 31 of the insert 5, inserting the tip of the screw 7 into the screw hole formed in the holder 3, and fixing the screw 7 to the screw hole. Fixed to.
- the through hole 31 for fixing the insert 5 to the holder 3 with the screw 7 is not limited to the direction along the rotation axis X1, but, for example, from the end point for reducing the size of the cutting tool 1, as in the present embodiment. It is preferable to extend in the direction along the rotation axis X1.
- the through hole 31 extends in the direction along the rotation axis X ⁇ b> 1, it is not necessary to secure a space for attaching the screw 7 in front of the insert 5.
- the thickness of the insert 5 in the part located in the back of the rotation direction X2 with respect to the outer peripheral cutting edge 27 can be ensured. Therefore, the holder 3 can be reduced in size.
- the number of the inserts 5 attached to the holder 3 can be increased, and the cutting efficiency can be improved.
- the screw 7 is fixed to the holder 3 by inserting it into the through hole 31 of the insert 5, but it is not limited to such a form.
- the insert 5 may be fixed to the holder 3 by a clamp mechanism.
- the size of the insert 5 is not particularly limited.
- the maximum value of the width in the direction from the front side surface 19 to the rear side surface 21 is set to about 5 to 20 mm.
- the maximum value of the width in the direction from the inner surface 25 to the outer surface 23 is set to about 5 to 20 mm.
- the maximum value of the width from the upper surface 13 to the lower surface 15 in the direction along the central axis of the through hole 31 is 3 to 10 mm.
- the insert 5 is mounted on the holder 3 so that the outer peripheral cutting edge 27 is inclined with respect to the rotation axis X1.
- This inclination angle is a so-called axial rake, and in the present embodiment, for example, it can be set to be greater than 0 ° and not more than 20 °.
- the pocket 9 in the holder 3 has a first inner surface 33, a second inner surface 35, a third inner surface 37, and a fourth inner surface 39 as inner walls, and a fifth inner surface 41 as an inner bottom surface. ing.
- the first inner surface 33 is one of the four inner walls positioned on the rear side in the rotational direction X2, and faces toward the front in the rotational direction X2.
- the first inner surface 33 contacts the rear side surface 21 of the insert 5.
- the second inner surface 35 is one of the four inner wall surfaces located behind the rotation direction X ⁇ b> 2, is adjacent to the first inner surface 33, and is located on the outer peripheral side from the first inner surface 33. .
- the third inner surface 37 is a surface located on the inner peripheral side among the four inner wall surfaces, is adjacent to the first inner surface 33, and faces the outer periphery of the holder 3.
- the third inner surface 37 contacts the inner surface 25 of the insert 5.
- the fourth inner surface 39 is a surface that is located in front of the rotational direction X2 and faces the front side surface 19 of the insert 5 among the four inner wall surfaces. When there is a slight gap between the third inner surface 37 of the pocket 9 and the front side surface 19 of the insert 5, the insert 5 can be easily attached to the pocket 9.
- the fifth inner surface 41 is a surface located on the rear end side as the inner bottom surface, and is adjacent to the first inner surface 33, the second inner surface 35, the third inner surface 37, and the fourth inner surface 39, and at the tip of the holder 3. Facing.
- the fifth inner surface 41 abuts on the upper surface 13 of the insert 5.
- the rear side surface 21, the inner side surface 25, and the upper surface 13 of the insert 5 come into contact with the first inner surface 33, the third inner surface 37, and the fifth inner surface 41 of the pocket 9, respectively.
- the positioning of the insert 5 is achieved.
- the rear side surface 21 of the insert 5 abuts on the surface of the pocket 9, specifically, the first inner surface 33, and the front side surface 19 of the insert 5 is the surface of the pocket 9, specifically Is away from the fourth inner surface 39. That is, the rear side surface 21 located behind the rotational direction X ⁇ b> 2 in the insert 5 is in contact with the first inner surface 33. From this, when cutting the workpiece using the outer peripheral cutting edge 27, the insert 5 can be stably held by the holder 3 against the cutting resistance applied from the outer peripheral cutting edge 27 toward the rear in the rotational direction X2. .
- the pocket 9 in this embodiment has the 1st opening part 9a opened toward the front end side, and the 2nd opening part 9b opened toward an outer peripheral side as already shown.
- the first opening 9 a can be visually recognized by viewing the holder 3 from the side.
- the first opening 9 a is a portion surrounded by the first inner surface 33, the second inner surface 35, the third inner surface 37, and the fourth inner surface 39 among the surfaces including the tip surface of the holder 3.
- the 2nd opening part 9b can be visually recognized by seeing the holder 3 at the front-end
- the insert 5 in the present embodiment has a pocket 9 as shown in FIG. 6 when the front end surface of the cutting tool 1 is viewed from the front (hereinafter, when the cutting tool 1 is viewed from the front or simply viewed from the front). It has the 1st site
- a portion of the insert 5 that is located on the inner peripheral side of the second opening 9b has a region that is wider than the width W2 of the second opening 9b in the direction along the rotational direction X2. is doing.
- this region is referred to as a first portion 5a.
- the first virtual straight line L1 is drawn in the radial direction from the portion located at the rear end of the rotation direction X2 in the first portion 5a, and passes through the portion located at the front end of the rotation direction X2 in the first portion 5a.
- a second virtual straight line L2 parallel to the first virtual straight line L1 is drawn.
- An interval between the first virtual line L1 and the second virtual line L2 can be set to a width W1 in the direction along the rotation direction X2 in the first portion 5a.
- the width W2 of the second opening 9b in the direction along the rotational direction X2 is defined as follows. Of the region in the pocket 9 that is in contact with or faces the side surface 17 of the insert 5 in front of the rotational direction X2, the end located on the outermost side is defined as the front end. Of the region in the pocket 9 that is in contact with or faces the side surface 17 of the insert 5 behind the rotational direction X2, the end located on the outermost peripheral side is defined as the rear end.
- a third virtual straight line L3 is drawn from the rear end portion in the radial direction, and a fourth virtual straight line L4 passing through the front end portion and parallel to the third virtual straight line L3 is drawn.
- the interval between the third imaginary straight line L3 and the fourth imaginary straight line L4 can be set to a width W2 in the direction along the rotation direction X2 in the second opening 9b.
- the position on the inner peripheral side means that a virtual circle that is centered on the rotation axis X1 and that passes through the reference region is set, and the inner peripheral side of the virtual circle is set.
- a virtual circle that is centered on the rotation axis X1 and passes through the second opening 9b is set. This means that the first part 5a is located on the inner peripheral side of the virtual circle.
- the holder 3 can be downsized. Further, the number of inserts 5 attached to the holder 3 can be increased.
- part 5a may satisfy
- the length D1 of the second opening 9b is a linear distance connecting the front end and the rear end of the second opening 9b in the front end view as shown in FIG.
- the length D2 of the first part 5a is the maximum value of the length of the first part 5a in the direction parallel to the length D1 of the second opening 9b in the front end view.
- the front side surface 19 and the rear side surface 21 of the insert 5 may be located in parallel. In the direction perpendicular to the front side surface 19, the distance D3 between the front side surface 19 and the rear side surface 21 may be larger than the width D4 of the second opening 9b.
- the width W2 of the second opening 9b can be made smaller than the width W1 of the first portion 5a of the insert 5. Therefore, even when a large centrifugal force is applied to the insert 5, the possibility that the insert 5 jumps out is reduced.
- the fact that the front side surface 19 and the rear side surface 21 are positioned in parallel does not require that both are positioned strictly in parallel.
- the rear side surface 21 may be inclined about 5 ° with respect to the front side surface 19.
- the inner wall surface of the pocket 9 in the present embodiment has a second inner surface 35 positioned on the outer peripheral side with respect to the first inner surface 33 contacting the rear side surface 21 of the insert 5 as shown in FIG. You may have.
- the second inner surface 35 is a surface located on the outermost peripheral side among the inner wall surfaces of the pocket 9.
- the edge part 35a located in the front of the rotation direction X2 in the 2nd inner surface 35 forms a part of 2nd opening part 9b shown in FIG.
- the second inner surface 35 may be inclined toward the front in the rotational direction X2 as it goes toward the outer peripheral side. In other words, the second inner surface 35 may protrude from the rear in the rotation direction X2 toward the front with respect to the first inner surface 33.
- being located on the outer peripheral side means that when the cutting tool 1 is viewed from the front end, a virtual circle that is centered on the rotation axis X1 and that passes through the reference region is set, and is located on the outer peripheral side from this virtual circle. It means that For example, when the second inner surface 35 is located on the outer peripheral side of the first inner surface 33, when the cutting tool 1 is viewed from the front end, a virtual circle that is centered on the rotation axis X1 and passes through the first inner surface 33 is set. This means that the second inner surface 35 is located on the outer peripheral side of the virtual circle.
- the insert 5 When the insert 5 has such a second inner surface 35, the insert 5 does not need to have a complicated shape such as forming a V-notch, and is second than the width W1 of the first portion 5a of the insert 5.
- the width W2 of the opening 9b can be reduced. Therefore, even when a large centrifugal force is applied to the insert 5, the insert 5 is caught on the second inner surface 35. Therefore, the possibility that the insert 5 jumps out is reduced.
- the second inner surface 35 may extend to the outer peripheral side from the inner peripheral end of the outer surface 23.
- the width W2 of the second opening 9b can be made smaller than the width W1 of the first portion 5a of the insert 5 while ensuring the area of the rear side surface 21 that is a surface that contacts the pocket 9. For this reason, a high restraining force of the insert 5 to the holder 3 is ensured, and the possibility that the insert 5 jumps outward is reduced.
- the second inner surface 35 in the present embodiment may be located on the inner peripheral side with respect to the outer peripheral cutting edge 27 in the insert 5.
- the possibility that the second inner surface 35 contacts the work material during the cutting process is reduced, so that the second inner surface 35 is damaged. Less likely to do.
- the possibility of scratching the work surface of the work material is reduced.
- the second inner surface 35 may be separated from the insert 5 when viewed from the front end. In other words, a gap may exist between the second inner surface 35 and the insert 5.
- the inner surface 25 of the insert 5 is in contact with the third inner surface 37 of the pocket 9. Therefore, when there is a gap between the outer surface 23 located on the opposite side of the inner surface 25 of the insert 5 and the second inner surface 35 of the pocket 9, the insert 5 can be easily attached to the pocket 9.
- the configuration of the second inner surface 35 is not particularly limited as long as the width W2 of the second opening 9b can be made smaller than the width W1 of the first portion 5a of the insert 5. Various configurations are possible. Can be adopted.
- part (convex part 47) which becomes may be formed.
- the convex portion 47 in the present embodiment has the rotation axis X1 at the root portion positioned rearward in the rotation direction X2 rather than the radial width W3 of the rotation axis X1 at the tip portion positioned in front of the rotation direction X2.
- the width W3 in the radial direction may be increased.
- the durability of the convex portion 47 becomes high and the convex portion 47 is hardly broken. For this reason, the protrusion 47 can stably prevent the insert 5 from jumping out. Further, since the radial width W3 of the entire convex portion 47 is not large, the possibility that the convex portion 47 protrudes to the outer peripheral side and interferes with the work material is reduced.
- the width W3 at the base portion of the convex portion 47 can be set to, for example, about 1 to 20% with respect to the width of the insert 5 in the radial direction of the rotation axis X1.
- the length of the convex portion 47 in the direction along the rotation direction X2 can be set to, for example, about 0.5 to 40% with respect to the length of the insert 5 in the direction along the rotation direction X2.
- the inner side surface of the convex portion 47, that is, the second inner surface 35 is set so as to be inclined, for example, by about 90 to 170 ° with respect to the first inner surface 33 in the front end view.
- the inclination angle ⁇ 1 of the second inner surface 35 with respect to the first surface 33 may be smaller than the inclination angle ⁇ 2 of the third inner surface 37 with respect to the first inner surface 33 in the front end view.
- the insert 5 includes the upper surface 13, the lower surface 15, and the side surface 17, and the side surface 17 includes the front side surface 19, the rear side surface 21, the outer side surface 23, and the inner side surface 25.
- the front side surface 19 of the insert 5 in the present embodiment is located on the inner peripheral side of the first surface 43 (rake surface 43) located along the outer peripheral cutting edge 27 and the rake surface 43. It has the 2nd surface 45 (standing wall part 45) located.
- the inner peripheral side of the rake face 43 and the standing wall 45 are adjacent to each other.
- the rake face 43 is an area where chips generated by the outer peripheral cutting edge 27 flow when cutting.
- the rake face 43 is inclined so as to approach the rear side face 21 as it moves away from the outer peripheral cutting edge 27 in order to allow chips to flow smoothly.
- the insert 5 in the present embodiment has a tip cutting edge 29. Therefore, the front side surface 19 of the insert 5 has another rake face along the tip cutting edge 29 in addition to the rake face 43.
- the standing wall portion 45 is located on the inner peripheral side with respect to the rake face 43, and is inclined so as to be separated from the rear side face 21 as it is separated from the rake face 43. In other words, the standing wall portion 45 is inclined so as to go forward in the rotational direction X2 as it goes to the inner peripheral side. More specifically, in the present embodiment, the standing wall portion 45 is disposed so as to be inclined with respect to the rake face 43 by, for example, about 10 to 15 °. Such a standing wall 45 may be used to curl the chips flowing through the rake face 43 to spiral the chips.
- the second opening 9 b of the pocket 9 is located on the inner peripheral side of the standing wall 45 when viewed from the front end. More specifically, the front end of the second opening 9 b of the pocket 9 is located on the inner peripheral side of the standing wall 45.
- the first end portion 45a positioned in front of the rotation direction X2 of the inclined standing wall portion 45 is positioned in front of the outer peripheral cutting edge 27 in the rotation direction X2.
- the chips generated by the outer peripheral cutting edge 27 can be stably brought into contact with the standing wall portion 45. Therefore, the possibility that chips generated by the outer peripheral cutting edge 27 come into contact with the holder 3 without coming into contact with the rake face 43 and the standing wall 45 is reduced. Therefore, the possibility that the holder 3 is damaged is reduced.
- the outer surface 23 of the insert 5 in the present embodiment has a first region 23 a located on the front side surface 19 side and a second region 23 b located on the rear side surface 21 side. ing.
- the second region 23b is inclined with respect to the first region 23a so as to be closer to the rotation axis X1 as it approaches the rear side surface 21 with respect to the first region 23a.
- the 2nd inner surface 35 is located over the outer peripheral side rather than the inner peripheral side edge part of the 2nd area
- the cutting tool 1 of one Embodiment was demonstrated in detail using drawing, the cutting tool of this invention is not limited to the structure of said embodiment.
- the cut workpiece is produced by cutting the workpiece 101.
- the manufacturing method of the cut workpiece in the present embodiment includes the following steps. That is, (1) a step of rotating the cutting tool 1 typified by the above embodiment around the rotation axis X1, (2) a step of bringing the cutting edge 11 in the rotating cutting tool 1 into contact with the work material 101; (3) a step of separating the cutting tool 1 from the work material 101; It has.
- the cutting tool 1 is relatively moved closer to the work material 101 by rotating the cutting tool 1 around the rotation axis X1 and moving it in the Y1 direction.
- the work material 101 is cut by bringing the cutting edge 11 of the cutting tool 1 into contact with the work material 101.
- the outer peripheral cutting edge 27 and the tip cutting edge 29 of the insert are brought into contact with the work material 101 as the cutting edge 11.
- the cutting tool 1 is moved away from the work material 101 by moving the cutting tool 1 in the Y2 direction.
- the work material 101 is fixed and brought close to the work material 101 while the cutting tool 1 is rotated around the rotation axis X1.
- the work material 101 is cut by bringing the cutting edge 11 of the rotating insert into contact with the work material 101.
- the cutting tool 1 is rotated away from the work material 101.
- the cutting tool 1 is brought into contact with the work material 101 by moving the cutting tool 1 in each step, or the cutting tool 1 is separated from the work material 101.
- the cutting tool 1 is not limited to such a form.
- the work material 101 may be brought close to the cutting tool 1 in the step (1).
- the work material 101 may be moved away from the cutting tool.
- the state in which the cutting tool 1 is rotated and the cutting blade 11 in the insert is brought into contact with a different part of the work material 101 may be repeated.
- typical examples of the material of the work material 101 include aluminum, carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metal.
Abstract
Description
(1)上記実施形態に代表される切削工具1を回転軸X1の周りで回転させる工程と、
(2)回転している切削工具1における切刃11を被削材101に接触させる工程と、
(3)切削工具1を被削材101から離す工程と、
を備えている。
3・・・ホルダ
5・・・切削インサート(インサート)
5a・・・第1部位
6・・・切屑ポケット
7・・・ネジ
9・・・ポケット
9a・・・第1開口部
9b・・・第2開口部
11・・・切刃
13・・・上面
15・・・下面
17・・・側面
19・・・第1側面(前側面)
21・・・第4側面(後側面)
23・・・第2側面(外側面)
23a・・・第1領域
23b・・・第2領域
25・・・第3側面(内側面)
27・・・第1切刃(外周切刃)
29・・・先端切刃
31・・・貫通孔
33・・・第1内面
35・・・第2内面
35a・・・端部
37・・・第3内面
39・・・第4内面
41・・・第5内面
43・・・第1面(すくい面)
45・・・第2面(立壁部)
47・・・凸部
101・・・被削材
Claims (12)
- 回転軸に沿って第1端から第2端にかけて延びる柱状体であるとともに、前記第1端側に位置するインサートポケットを有するホルダと、
前記インサートポケットに位置するとともに、切刃を有する切削インサートと、を備え、
前記インサートポケットは、前記ホルダの前記第1端に位置する端面および外周面に開口しており、
前記切削インサートは、前記第1端の正面視において、前記インサートポケットの外周側の開口部よりも内周側に位置する第1部位を有しており、
前記回転軸の回転方向に沿った方向において、前記第1部位の幅が、前記開口部の幅よりも大きい、切削工具。 - 前記第1端の正面視において、前記開口部の開口長さに平行な方向において、前記第1部位の長さが、前記開口部の開口長さよりも大きい、請求項1に記載の切削工具。
- 前記切削インサートは、前記回転方向の前方に位置する第1側面と、前記回転軸の径方向の外周側に位置する第2側面と、該第2側面よりも前記径方向の内周側に位置するとともに前記インサートポケットに当接する第3側面と、前記第1側面よりも前記回転方向の後方に位置するとともに前記インサートポケットに当接する第4側面と、を有しており、
前記切刃は、前記第1側面と前記第2側面との交差部に位置する第1切刃を有し、
前記第1側面と前記第4側面とは平行に位置しており、
前記第1端の正面視において、前記第1側面に垂直な方向において、前記第1側面と前記第4側面との距離は、前記開口部の幅よりも大きい、請求項1または2に記載の切削工具。 - 前記切削インサートは、前記回転方向の前方に位置する第1側面と、前記回転軸の径方向の外周側に位置する第2側面と、該第2側面よりも前記径方向の内周側に位置するとともに前記インサートポケットに当接する第3側面と、前記第1側面よりも前記回転方向の後方に位置するとともに前記インサートポケットに当接する第4側面と、を有しており、
前記切刃は、前記第1側面と前記第2側面との交差部に位置する第1切刃を有し、
前記インサートポケットは、前記第4側面と当接する第1内面と、該第1内面よりも外周側に位置する第2内面と、を有しており、
前記第1端の正面視において、前記第2内面は、前記外周側に向かうにつれて前記回転方向の前方に向かって傾斜している、請求項1または2に記載の切削工具。 - 前記第2内面は、前記切削インサートの前記第2側面の内周側端部よりも前記外周側に延びている、請求項4に記載の切削工具。
- 前記第2内面は、前記切削インサートの前記第1切刃よりも前記内周側に位置している、請求項4または5に記載の切削工具。
- 前記第1端の正面視において、前記第2内面は、前記切削インサートから離れている、請求項4~6のいずれか1つに記載の切削工具。
- 前記第1側面は、前記第1切刃に沿って位置する第1面と、該第1面よりも前記内周側に位置するととともに前記内周側に向かうにつれて前記回転方向の前方に向かって傾斜する第2面と、を有し、
前記開口部は、前記第2面よりも前記内周側に位置している、請求項1~7のいずれかに記載の切削工具。 - 前記第1端の正面視において、前記第2面は、前記回転方向の前方に位置する第1端部を有しており、
該第1端部は、前記切刃よりも前記回転方向の前方に位置している、請求項8に記載の切削工具。 - 前記第1側面は、前記インサートポケットから離れている、請求項2~9のいずれか1つに記載の切削工具。
- 前記切削インサートは、前記回転軸に沿った方向に延びる貫通孔を有しており、
該貫通孔に挿入されたネジによって、前記切削インサートが前記ホルダに固定されている、請求項1~10のいずれか1つに記載の切削工具。 - 請求項1~11のいずれか1つに記載の切削工具を回転させる工程と、
回転している前記切削工具の前記切刃を被削材に接触させる工程と、
前記切削工具を前記被削材から離す工程と、を備えた切削加工物の製造方法。
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US15/738,153 US10413978B2 (en) | 2015-06-25 | 2016-06-27 | Cutting tool and method for manufacturing cut workpiece |
JP2017525480A JP6467049B2 (ja) | 2015-06-25 | 2016-06-27 | 切削工具及び切削加工物の製造方法 |
DE112016002843.1T DE112016002843T5 (de) | 2015-06-25 | 2016-06-27 | Schneidwerkzeug und Verfahren zur Herstellung eines geschnittenen Werkstücks |
CN201680036926.3A CN107735203B (zh) | 2015-06-25 | 2016-06-27 | 切削工具以及切削加工物的制造方法 |
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US10413978B2 (en) | 2019-09-17 |
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