WO2011071007A1 - 刃先交換式切削工具 - Google Patents
刃先交換式切削工具 Download PDFInfo
- Publication number
- WO2011071007A1 WO2011071007A1 PCT/JP2010/071809 JP2010071809W WO2011071007A1 WO 2011071007 A1 WO2011071007 A1 WO 2011071007A1 JP 2010071809 W JP2010071809 W JP 2010071809W WO 2011071007 A1 WO2011071007 A1 WO 2011071007A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cutting
- insert
- cutting insert
- wall surface
- constraining wall
- 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
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/109—Shank-type cutters, i.e. with an integral shaft with removable 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
- B23D31/002—Breaking machines, i.e. pre-cutting and subsequent breaking
- B23D31/003—Breaking machines, i.e. pre-cutting and subsequent breaking for rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/16—Fixation of inserts or cutting bits in the tool
- B23C2210/168—Seats for cutting inserts, supports for replacable cutting bits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2220/00—Details of milling processes
- B23C2220/16—Chamferring
-
- 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
-
- 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
- B23C5/202—Plate-like cutting inserts with special form
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
Definitions
- the present invention relates to a blade-tip-exchangeable cutting tool on which a cutting insert is detachably mounted, and particularly relates to a tool for cutting a shape portion.
- This chamfering cutter has a rhombus flat chamfering cutter cutting insert on the insert mounting seat formed at the tip of the cutter body, with the rhombus surface as the rake face and oriented in the cutter rotation direction, and the edge of the rake face.
- This is a chamfering cutter that is detachably attached by inclining the cutting edge formed in the section toward the outer peripheral side toward the rear end side of the cutter body.
- the cutting insert for the chamfering cutter has the cutting edges formed on the side ridges on the side of the rhombus that alternate in the circumferential direction of the cutting insert among the side ridges of the pair of rhombus surfaces, and the cutting edges
- Each peripheral surface of the continuous cutting insert is a flank and is inclined so as to gradually recede as it is separated from the cutting edge.
- the cutting insert has a pair of peripheral surfaces extending from the acute corner portion of the rhombic surface abuts against the wall surface of the insert mounting seat corresponding to each peripheral surface, so that the cutting insert is It is fixed in a predetermined posture.
- the tightening screw that engages the inner peripheral surface of the mounting hole of the cutting insert is closer than the center of the mounting hole.
- the cutting insert receives a rotational moment in the rotational direction of the tightening screw due to the contact between the tightening screw and the inner peripheral surface of the mounting hole. It is rotated in the direction of rotation of the tightening screw. Therefore, the cutting edge of the cutting insert cannot be correctly positioned with respect to the cutter body, and the chamfered portion cut by the cutting edge also deteriorates the shape accuracy. Moreover, the cutting insert rotates in the direction opposite to the rotation direction due to the cutting resistance received by the cutting insert during the cutting process. Therefore, the tightening screw is loosened, and the cutting insert is further rotated. In the worst case, the cutting edge may be damaged or the insert mounting seat may fall off.
- This invention was made in order to solve the above-mentioned problem, and it aims at improving the positioning accuracy with respect to the tool main body of the cutting blade of a cutting insert, and raising the processing accuracy of the shape part of a workpiece.
- One embodiment of the present invention has the following configuration.
- a cutting edge exchangeable cutting tool having an insert mounting seat for detachably mounting a cutting insert, and a substantially flat cutting insert mounted on the insert mounting seat,
- the insert mounting seat has a substantially flat bottom surface, and first and second restraining wall surfaces that stand upward from the bottom surface and are not parallel to each other; When viewed from the side facing the bottom surface, the angle formed by the first and second constraining wall surfaces is more than the angle formed by the two peripheral surfaces of the cutting insert facing the first and second constraining wall surfaces, respectively. small, The lower surface of the cutting insert is in contact with the bottom surface, and the two peripheral surfaces are in contact with the first and second restraining wall surfaces facing the peripheral surfaces, respectively.
- One peripheral surface of the two peripheral surfaces of the cutting insert is in contact with the first constraining wall surface in a posture substantially parallel to the extending direction of the first constraining wall surface, and the other peripheral surface is An edge-replaceable cutting tool, wherein the cutting tool is inclined with respect to a direction in which the second constraining wall surface extends and contacts the second constraining wall surface at one end of the second constraining wall surface.
- one of the two peripheral surfaces of the cutting insert abuts on the first constraining wall surface in a posture parallel to the extending direction of the first constraining wall surface facing the peripheral surface. . That is, the one peripheral surface is in line contact or surface contact along the direction in which the first constraining wall surface extends.
- the other peripheral surface is inclined with respect to the extending direction of the second constraining wall surface facing the peripheral surface, and abuts against the second constraining wall surface at one end of the second constraining wall surface. That is, the other peripheral surface is in point contact or line contact with the second constraining wall surface at one end of the second constraining wall surface.
- the cutting insert attached to the insert mounting seat in this manner is constrained in a state in which the one peripheral surface is parallel to the direction in which the first constraining wall surface extends, so the mounting accuracy of the cutting insert to the insert mounting seat And the mounting stability is improved.
- the positioning accuracy with respect to the tool main body of the cutting blade which cuts a shape part, and the processing accuracy of a shape part improve.
- the mounting accuracy and mounting stability of the cutting insert are improved. Further, the positioning accuracy of the cutting insert with respect to the tool body and the processing accuracy of the shape portion cut by the cutting blade are improved.
- FIG. 5 is an end view taken along line VV in FIG. 4. It is a front view of the cutting insert with which the chamfering cutter shown in FIG. 1 is mounted. It is a right view of the cutting insert shown in FIG. It is a bottom view of the cutting insert shown in FIG.
- the chamfering cutter detachably mounts a cutting insert 10 having a cutting edge 13 on an insert mounting seat 5 formed on the outer periphery of the tip of the tool body 1.
- the tool body 1 has a substantially cylindrical shape that can be rotated around the central axis CL.
- a shank 3 for mounting the tool body 1 on a machine tool such as a machining center is formed on the rear end side (left side in FIG. 2) of the tool body 1, and the tip side of the tool body 1 (right side in FIG. 2).
- the blade part 2 provided with the insert mounting seat 5 is formed.
- a chip pocket 4 is formed in the outer peripheral surface of the blade portion 2 so as to extend from the front end surface of the blade portion 2 toward the rear end side.
- An insert mounting seat 5 formed so as to be recessed by one step from the wall surface is formed on the wall surface of the chip pocket 4 facing the cutter rotation direction K side.
- the insert mounting seat 5 includes a substantially flat bottom surface 6 and at least two restraining wall surfaces standing upward from the bottom surface 6, that is, first and second restraining wall surfaces. 7a, 7b.
- the direction in which the first constraining wall surface 7a extends with respect to a reference plane orthogonal to the central axis CL of the tool body 1 coincides with a desired chamfer angle.
- the first constraining wall surface 7a is formed to be inclined 45 ° with respect to the reference plane.
- the bottom surface 6 is formed as a substantially flat surface and faces and contacts the seating surface 16 of the cutting insert 10.
- a female screw hole 9 is formed in a substantially central portion of the bottom surface 6.
- the first and second constraining wall surfaces 7 a and 7 b extend in a direction rising from the bottom surface 6, that is, in a substantially orthogonal direction, and form a predetermined angle with each other.
- the first and second constraining wall surfaces 7a and 7b abut against the peripheral surfaces 17a and 17b of the opposing cutting insert 10, respectively.
- the cutting insert 10 has a substantially square plate shape, and is a rake face 11 formed on at least one of the square faces serving as the upper and lower faces of the cutting insert 10, and the rake face 11.
- a seating surface 16 formed on a square surface opposite to the square surface, the rake surface 11, a clearance surface 12 formed on a peripheral surface extending between a pair of square surfaces serving as the seating surface 16, and the rake surface 11 and the clearance
- the cutting edge 13 formed in the intersection ridgeline part with the surface 12 and the attachment hole 15 which penetrates the center part of a square surface in the thickness direction are provided.
- the cutting insert 10 is a positive type in which a square surface serving as the rake face 11 and a circumferential surface serving as the flank 12 intersect at an acute angle and have a positive flank angle.
- the flank 12 may be a negative type having a flank angle of 0 °.
- the clearance angle of the flank 12 of the cutting insert 10 is 11 °.
- both sides can be used by selectively using the opposing square surfaces as the rake face 11.
- the rake face 11 is formed of a substantially flat square surface.
- the rake face 11 is not limited to this, and includes an inclined surface in which a portion connected to the cutting edge 13 is inclined with respect to the square surface. It may be a thing. In this case, a positive or negative rake angle is given by the inclined surface.
- At least a portion to be the cutting edge 13 of the cutting insert 10 is made of a hard material such as a cemented carbide, a coated cemented carbide, a cermet, a ceramic, or an ultra-high pressure sintered body containing diamond or cubic boron nitride.
- the head of the tightening screw 20 presses the inner wall surface of the mounting hole 15 toward the bottom surface 6 side of the insert mounting seat and the first and second restraining wall surfaces 7a and 7b, whereby the cutting insert 10 is The insert mounting seat 5 is detachably attached.
- the cutting blades 13 of the attached cutting insert 10 the cutting blades arranged on the outer peripheral side of the tip end of the tool body 1 become the main cutting blade 14 for cutting the chamfered portion of the work material.
- the angle ⁇ formed between the first and second restraint wall surfaces 7 a and 7 b abuts on the first and second restraint wall surfaces 7 a and 7 b. It is slightly smaller than the angle ⁇ formed by the two peripheral surfaces 17a, 17b of the cutting insert 10. In this embodiment, the angle ⁇ formed by the two peripheral surfaces is 90 °, but the angle ⁇ formed by the first and second constraining wall surfaces is 89.5 °.
- the angle ⁇ formed by the first constraining wall surface 7 a and the bottom surface 6 in the present embodiment is an obtuse angle.
- the angle ⁇ is smaller by about 0.5 ° than the angle ⁇ formed by the peripheral surface 17a of the cutting insert that contacts the first constraining wall surface 7a and the seating surface 16 of the cutting insert.
- the two peripheral surfaces 17a do not come into surface contact with the first constraining wall surface 7a, and are substantially in contact with the upper end portion 8a of the first constraining wall surface 7a that is farthest away in the direction (upward) from the bottom surface 6. It will contact
- the angle formed between the second constraining wall surface 7b and the bottom surface 6 is also ⁇ , which is about 0.5 ° smaller than the angle ⁇ formed between the peripheral surface 17b of the cutting insert 6 and the seating surface 16. .
- the cutting insert 10 receives a rotational moment in the same direction as the screwing rotational direction S of the fastening screw 20 due to the contact between the inner wall surface of the mounting hole 15 and the head of the fastening screw 20. .
- the cutting insert 10 is pressed by the head of the tightening screw 20 toward the first constraining wall surface 7a located on the front side in the screwing rotation direction S. Therefore, the peripheral surface 17a of the cutting insert 10 facing the first constraining wall surface 7a is in line contact with the upper end portion 8a of the first constraining wall surface 7a over almost the entire length in the extending direction of the first constraining wall surface 7a. It is supported and restrained.
- the peripheral surface 17a is reliably supported and restrained in a posture parallel to the extending direction of the first restraining wall surface 7a.
- the angle ⁇ formed by the first constraining wall surface 7a and the second constraining wall surface 7b is smaller than the angle ⁇ formed by the peripheral surface 17a and the peripheral surface 17b of the cutting insert 10, the screwing rotation of the cutting insert 10 is performed.
- the extending direction of the other peripheral surface 17b located on the rear side in the direction S is inclined with respect to the extending direction of the second constraining wall surface 7b facing the peripheral surface 17b.
- the peripheral surface 17b of the cutting insert 10 is a part of the second constraining wall surface 7b, and is supported and constrained in a substantially point contact state by the end portion 8b located on the rear side in the screwing rotation direction S. Therefore, when viewed from the side facing the bottom surface 6 of the insert mounting seat, the cutting insert 10 has the main cutting edge 14 at a position facing the circumferential surface in line contact with the first constraining wall surface 7a. With a slope equal to
- the center C2 of the female screw hole 9 formed in the bottom surface 6 is relative to the center C1 of the mounting hole 15 of the cutting insert 10 placed on the insert mounting seat 5.
- the first and second constraining wall surfaces 7a and 7b are biased so as to approach each other.
- the center C2 of the female screw hole 9 passes through the center C1 of the mounting hole 15, and the screwing rotation of the tightening screw 20 out of the first and second restraining wall surfaces 7a and 7b.
- the first constraining surface is larger than 0 ° on the second constraining wall surface 7b side located on the rear side in the screwing rotation direction S and Along the virtual straight line L2 inclined at an angle ⁇ smaller than 1 ⁇ 2 of the angle ⁇ formed by the two constraining wall surfaces, they are somewhat biased to approach the first and second constraining wall surfaces 7a and 7b. . That is, the center C2 of the female screw hole 9 is not evenly biased to the first and second restraining wall surfaces 7a and 7b with respect to the center C1 of the mounting hole 15, but is biased toward the first restraining wall surface 7a. (Larger).
- the cutting insert 10 that engages with the head of the tightening screw 20 that is screwed into the female screw hole 9 whose center C2 is biased in this way is brought close to the first constraining wall surface 7a and the second constraining wall surface 7b.
- the first constraining wall surface 7a is moved closer.
- the main cutting edge 14 of the cutting insert 10 mounted on the chamfering cutter according to the present embodiment has an axial rake angle (axial rake angle) and a radial rake angle (radial rake angle) of 0 ° as can be seen from FIGS. 1 and 3. Is set to
- the chamfering cutter described above is rotated around the central axis CL of the tool body 1 and fed along the chamfered portion 21 of the work material, so that the main cutting edge 14 cuts the chamfered portion.
- the main cutting edge 14 cuts the work material to form a chamfered portion. Therefore, the positioning accuracy of the main cutting edge 14 with respect to the tool body 1 of the chamfering cutter greatly affects the processing accuracy of the chamfered portion.
- One peripheral surface 17a of the cutting insert 10 pressed against the first and second constraining wall surfaces 7a and 7b of the insert mounting seat 5 by the tightening screw 20 is formed on the cutting insert 10 as the tightening screw 20 rotates.
- the first restraint wall surface 7a is supported and restrained in line contact with the upper end portion 8a of the first restraint wall surface 7a over the entire length in the extending direction. That is, the peripheral surface 17a is supported and restrained in a state parallel to the extending direction of the first restraining wall surface 7a.
- the angle ⁇ formed between the first and second constraining wall surfaces 7a and 7b is equal to the two peripheral surfaces 17a of the cutting insert 10 in contact with the first and second constraining wall surfaces 7a and 7b. It is slightly smaller than the angle ⁇ formed by 17b. Therefore, the other peripheral surface 17b of the cutting insert 10 is inclined with respect to the extending direction of the second constraining wall surface 7b facing the peripheral surface 17b, and is behind the screwing rotation direction S of the second constraining wall surface 7b.
- the one end 8b located on the side is supported and restrained in a substantially point contact state.
- peripheral surface 17a is in line contact over substantially the entire upper end portion 8a of the first constraining wall surface 7a along the direction in which the first constraining wall surface 7a extends, while the other peripheral surface 17b is the second one.
- the cutting insert 10 when viewed from the side facing the bottom surface 6 of the insert mounting seat, the cutting insert 10 is mounted so as to have the same inclination as the chamfered portion 21 to be cut by the main cutting edge 14 having a relationship facing one circumferential surface. It is done. As a result, the processing accuracy of the chamfered portion 21 cut by the main cutting edge 14 becomes very good.
- the cutting insert 10 is brought closer to the first restraining wall surface 7a and the second restraining wall surface 7b by the tightening screw 20, and more particularly closer to the first restraining wall surface 7a. Therefore, the cutting insert 10 is more strongly pressed to the first constraining wall surface 7a side than to the second constraining wall surface 7b side.
- the line contact between the circumferential surface 17a located on the front side in the screwing rotation direction S of the clamping screw 20 of the cutting insert 10 and the upper end portion 8a of the first restraint wall surface 7a becomes stronger, and the circumferential surface 17a is supported and restrained more strongly in a state parallel to the extending direction of the upper end portion 8a of the first restraining wall surface 7a.
- the peripheral surface 17a located on the front side in the screwing rotation direction S is a first constraining wall surface so as to counter the rotational moment acting toward the front side in the screwing rotation direction S of the clamping screw 20 of the cutting insert 10.
- the cutting insert 10 By supporting and restraining in a state parallel to the extending direction of the upper end portion 8a of 7a, the cutting insert 10 is reliably prevented from being moved by the tightening screw 20 to the screwing rotation direction S side. As a result, the tightening screw 20 does not loosen, so that the mounting stability of the cutting insert 10 and the processing accuracy of the chamfered portion can be maintained well over a long period of time.
- the two peripheral surfaces 17a and 17b of the cutting insert 10 do not come into surface contact with the first and second constraining wall surfaces 7a and 7b, and each peripheral surface is the most in the direction (upward) rising from the bottom surface 6 of the insert mounting seat. It abuts against the upper ends of the constrained restraint wall surfaces 7a and 7b. This further stabilizes the contact state between the first and second constraining wall surfaces 7a and 7b and the peripheral surfaces 17a and 17b, so that the positioning accuracy of the cutting insert 10 is further improved and the processing accuracy of the chamfered portion is extremely good. It becomes.
- the main cutting edge 14 of the cutting insert 10 mounted on the chamfering cutter has an axial rake angle (axial rake) and a radial rake angle (radial rake) set to 0 °.
- the angle formed between the central axis CL of the tool body 1 and the main cutting edge 14 in the side view of the chamfered cutter is the center axis CL when rotating around the central axis CL of the chamfered cutter.
- the main cutting edge 14 can be formed in parallel to the peripheral surface 17a that is in contact with the first constraining wall surface 7a. The accuracy of the main cutting edge 14 is increased. From the above, the positioning accuracy of the main cutting edge 14 with respect to the tool body 1 becomes extremely high.
- the present invention is not limited to the embodiment described above, and it goes without saying that the configuration can be changed, deleted, and added as appropriate.
- the present invention is not limited to a chamfering cutter, but can be applied to a cutting edge replaceable cutting tool, an end mill, a cutter, and the like used for processing a shape portion of a work material.
- the screwing direction S of the tightening screw 20 is generally clockwise, but may be counterclockwise depending on the configuration and arrangement of the first and second restraining wall surfaces 7a and 7b.
- the shape of the cutting insert 10 is not limited to a substantially square plate shape, and may be a polygonal plate shape such as a quadrangle, a triangle, or a pentagon.
- the upper end portions 8a of the two restraining wall surfaces 7a and 7b of the insert mounting seat 5 are not limited to the mode in which they contact the peripheral surfaces 17a and 17b of the cutting insert 10, but the entire restraining wall surfaces 7a and 7b are in contact with the peripheral surfaces 17a and 17b. It may be in a mode in which the portions other than the upper end portions of the constraining wall surfaces 7a and 7b are in contact with the peripheral surface of the cutting insert in a limited manner.
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Abstract
Description
前記インサート取付座は、実質的に平坦な底面、および前記底面から上方へ起立し、かつ互いに平行でない第1及び第2の拘束壁面を有し、
前記底面に対向する側からみて、前記第1及び第2の拘束壁面同士のなす角度は、これら第1及び第2の拘束壁面に夫々対向する前記切削インサートの二つの周面同士のなす角度より小さく、
前記切削インサートの下面は前記底面に当接するとともに、前記二つの周面はこれら周面に夫々対向する前記第1及び第2の拘束壁面に当接し、
前記切削インサートの前記二つの周面のうち一方の周面は、前記第1の拘束壁面の延在する方向に略平行な姿勢で前記第1の拘束壁面に当接し、他方の周面は、前記第2の拘束壁面の延在する方向に対して傾斜し、前記第2の拘束壁面の一端部で前記第2の拘束壁面に当接することを特徴とする刃先交換式切削工具。
前記底面6は、実質的な平坦面で形成され、切削インサート10の着座面16に対向し当接する。また、前記底面6のほぼ中央部には雌ねじ穴9が形成されている。図4に図示したように、第1及び第2の拘束壁面7a、7bは、底面6から起立する方向に、すなわち略直交する方向に延びており、互いに所定の角度をなす。第1及び第2の拘束壁面7a、7bは、対向する切削インサート10の周面17a、17bに夫々当接する。
一方で、第1の拘束壁面7aと第2の拘束壁面7bとがなす角度αが、切削インサート10の周面17aと周面17bとがなす角度βよりも小さいため、切削インサート10のねじ込み回転方向Sの後方側に位置する他方の周面17bの延在する方向は、該周面17bに対向する第2の拘束壁面7bの延在する方向に対して傾斜している。そのため、切削インサート10の周面17bは、第2の拘束壁面7bの一部であって、ねじ込み回転方向Sの後方側に位置する端部8bによって、ほぼ点接触の状態で支持拘束される。したがって、インサート取付座の底面6に対向する側からみて、切削インサート10は、第1の拘束壁面7aに線接触する周面に対向する位置にある主切れ刃14が被削材の面取り部21と等しい傾きを有する。
さらに、切削インサート10の締付ねじ20のねじ込み回転方向Sの前方側に向かって作用する回転モーメントに対抗するように、ねじ込み回転方向Sの前方側に位置する周面17aが第1の拘束壁面7aの上端部8aの延在する方向に平行な状態で支持拘束されることで、切削インサート10が締付ねじ20につられてねじ込み回転方向S側へ動くことを確実に防止される。このことにより、締付ねじ20の緩みを生じることがないため、切削インサート10の取付安定性、および面取り部の加工精度を長期にわたって良好に維持することができる。
2 刃部
3 シャンク
4 切りくずポケット
5 インサート取付座
6 インサート取付座の底面
7a 第1の拘束壁面
7b 第2の拘束壁面
8a 拘束壁面の上端部
8b 拘束壁面の一端部
9 雌ねじ穴
10 切削インサート
11 すくい面
12 逃げ面
13 切れ刃
14 作用切れ刃
15 切削インサートの取付穴
16 切削インサートの着座面
17a、17b 切削インサートの周面
20 締付ねじ
21 面取り部
CL 中心軸線
K カッタ回転方向
S 締付ねじのねじ込み回転方向
C1 切削インサートの取付穴の中心
C2 雌ねじ穴の中心
α インサート取付座の二つの拘束壁面同士のなす角度
β 切削インサートの二つの周面同士のなす角度
γ インサート取付座の拘束壁面と底面とのなす角度
δ 切削インサートの周面と着座面とのなす角度
ε 直線L1と直線L2とのなす角度
Claims (5)
- 切削インサートを着脱自在に取り付けるためのインサート取付座と、前記インサート取付座に装着された略平板状の切削インサートと、を有する刃先交換式切削工具であって、
前記インサート取付座は、実質的に平坦な底面、および前記底面から上方へ起立し、かつ互いに平行でない第1及び第2の拘束壁面を有し、
前記底面に対向する側からみて、前記第1及び第2の拘束壁面同士のなす角度は、これら第1及び第2の拘束壁面に夫々対向する前記切削インサートの二つの周面同士のなす角度より小さく、
前記切削インサートの下面は前記底面に当接するとともに、前記二つの周面はこれら周面に夫々対向する前記第1及び第2の拘束壁面に当接し、
前記切削インサートの前記二つの周面のうち一方の周面は、前記第1の拘束壁面の延在する方向に略平行な姿勢で前記第1の拘束壁面に当接し、他方の周面は、前記第2の拘束壁面の延在する方向に対して傾斜し、前記第2の拘束壁面の一端部で前記第2の拘束壁面に当接することを特徴とする刃先交換式切削工具。 - 前記切削インサートは、中央部を厚み方向に貫通して形成された取付穴を有し、
前記インサート取付座は、前記切削インサートを取り付けるために締付ねじがねじ込まれる雌ねじ穴を有し、
前記インサート取付座の底面に対向する側からみて、前記雌ねじ穴の中心点は、前記インサート取付座に載置された前記切削インサートの取付穴の中心から前記第1の拘束壁面に引いた垂線に対して、前記第2の拘束壁面に近づく側に0°より大きい角度であって、かつ前記第1及び第2の拘束壁面どうしがなす角度の1/2未満の角度で傾斜する直線上に配置されていることを特徴とする請求項1に記載の刃先交換式切削工具。 - 前記インサート取付座は、前記切削インサートを取り付けるために締付ねじがねじ込まれる雌ねじ穴を有し、
前記第1の拘束壁面は、前記締付ねじのねじ込み回転方向前方側に位置し、前記第2の拘束壁面は、前記ねじ込み回転方向後方側に位置することを特徴とする請求項1に記載の刃先交換式切削工具。 - 前記第1及び第2の拘束壁面の、前記底面から起立する方向に離間した上端部が、前記切削インサートの周面に当接することを特徴とする請求項1に記載の刃先交換式切削工具。
- 前記切削インサートの少なくとも上面の稜線部に形成されて被削材の形状部を切削する切れ刃は、前記切削インサートが前記工具本体に取り付けられたときに、その軸方向すくい角および径方向すくい角が0°であることを特徴とする請求項1に記載の刃先交換式切削工具。
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Application Number | Priority Date | Filing Date | Title |
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CN2010800558130A CN102639271A (zh) | 2009-12-08 | 2010-12-06 | 刃尖更换式切削工具 |
BR112012013546A BR112012013546A2 (pt) | 2009-12-08 | 2010-12-06 | ferramenta de corte com ponta substituível. |
EP10835927.4A EP2511035B1 (en) | 2009-12-08 | 2010-12-06 | Cutting tool with a replaceable blade edge |
CA2781817A CA2781817A1 (en) | 2009-12-08 | 2010-12-06 | Tip-replaceable cutting tool |
RU2012122764/02A RU2012122764A (ru) | 2009-12-08 | 2010-12-06 | Режущий инструмент со сменной головкой |
JP2011514907A JP4883430B2 (ja) | 2009-12-08 | 2010-12-06 | 刃先交換式切削工具 |
US13/480,183 US9089908B2 (en) | 2009-12-08 | 2012-05-24 | Tip-replaceable cutting tool |
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JP2009-278296 | 2009-12-08 | ||
JP2009278296 | 2009-12-08 |
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US13/480,183 Continuation-In-Part US9089908B2 (en) | 2009-12-08 | 2012-05-24 | Tip-replaceable cutting tool |
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WO2011071007A1 true WO2011071007A1 (ja) | 2011-06-16 |
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PCT/JP2010/071809 WO2011071007A1 (ja) | 2009-12-08 | 2010-12-06 | 刃先交換式切削工具 |
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US (1) | US9089908B2 (ja) |
EP (1) | EP2511035B1 (ja) |
JP (1) | JP4883430B2 (ja) |
KR (1) | KR20120083499A (ja) |
CN (1) | CN102639271A (ja) |
BR (1) | BR112012013546A2 (ja) |
CA (1) | CA2781817A1 (ja) |
RU (1) | RU2012122764A (ja) |
WO (1) | WO2011071007A1 (ja) |
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CN108274023A (zh) * | 2018-02-24 | 2018-07-13 | 中信戴卡股份有限公司 | 一种车轮机加刀具 |
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Also Published As
Publication number | Publication date |
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RU2012122764A (ru) | 2014-01-20 |
CN102639271A (zh) | 2012-08-15 |
EP2511035B1 (en) | 2016-10-12 |
EP2511035A4 (en) | 2013-06-12 |
CA2781817A1 (en) | 2011-06-16 |
KR20120083499A (ko) | 2012-07-25 |
BR112012013546A2 (pt) | 2017-10-10 |
US9089908B2 (en) | 2015-07-28 |
US20120230790A1 (en) | 2012-09-13 |
JPWO2011071007A1 (ja) | 2013-04-22 |
JP4883430B2 (ja) | 2012-02-22 |
EP2511035A1 (en) | 2012-10-17 |
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