WO2013051703A1 - 刃先交換式切削工具 - Google Patents
刃先交換式切削工具 Download PDFInfo
- Publication number
- WO2013051703A1 WO2013051703A1 PCT/JP2012/075998 JP2012075998W WO2013051703A1 WO 2013051703 A1 WO2013051703 A1 WO 2013051703A1 JP 2012075998 W JP2012075998 W JP 2012075998W WO 2013051703 A1 WO2013051703 A1 WO 2013051703A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cutting
- insert
- cutting tool
- side wall
- cutting insert
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
- B23B27/1614—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert
- B23B27/1622—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert characterised by having a special shape
-
- 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
- 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
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/04—Overall shape
- B23B2200/0461—Round
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/16—Supporting or bottom surfaces
- B23B2200/165—Supporting or bottom surfaces with one or more grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/36—Other features of cutting inserts not covered by B23B2200/04 - B23B2200/32
- B23B2200/3627—Indexing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2205/00—Fixation of cutting inserts in holders
- B23B2205/12—Seats for cutting inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2205/00—Fixation of cutting inserts in holders
- B23B2205/16—Shims
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2260/00—Details of constructional elements
- B23B2260/104—Markings, i.e. symbols or other indicating marks
-
- 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
- B23C2200/045—Round
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/16—Supporting or bottom surfaces
- B23C2200/165—Supporting or bottom surfaces with one or more grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/16—Supporting or bottom surfaces
- B23C2200/168—Supporting or bottom surfaces with features related to indexing
-
- 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
- B23C2210/163—Indexing
-
- 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
- B23C2210/166—Shims
-
- 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
-
- 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
- Y10T407/00—Cutters, for shaping
- Y10T407/19—Rotary cutting tool
- Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
Definitions
- the present invention relates to a cutting edge exchangeable cutting tool to which a cutting insert can be attached and detached.
- Patent Document 1 has the following problems.
- the dimension of the protrusion is designed to be slightly smaller than the dimension of the recess. For this reason, a slight gap is formed between the protrusion and the recess.
- Various manufacturing dimensional errors also accumulate. For this reason, the contact location of a protrusion and a recessed part changes according to a clearance gap, a dimension error, etc.
- the rotational moment due to the cutting force acting on the cutting insert cannot be stably supported. That is, if the contact points between the protrusions and the recesses are different, the rotational moment acting on the cutting insert cannot be received under the same conditions, and the surface roughness of the finished surface may not be stable.
- One of the objects of the present invention is to provide a cutting edge replaceable cutting tool having a structure capable of stably supporting a rotational moment acting on a cutting insert clamped on an insert mounting surface of a body.
- the cutting edge replaceable cutting tool (1) of the present invention includes a plate-shaped cutting insert (10) having opposed upper and lower surfaces (11, 13) and a side surface (12) extending between the upper and lower surfaces,
- the cutting insert having a base surface (21A) for supporting the lower surface (13) of the cutting insert (10) and side wall surfaces (21B, 21C) for supporting the side surface (12) of the cutting insert (10).
- the body (20) having an insert mounting part (21) for detachably mounting;
- a receiving mechanism for receiving a rotational moment acting on the cutting insert (10) so as to rotate the cutting insert (10) mounted on the insert mounting portion (21) on the base surface (21A);
- the receiving mechanism includes a first engaging portion (14) formed on a lower surface of the cutting insert (10),
- a second engagement portion (25) formed on the base surface (21A) of the insert mounting portion (21),
- the second engagement portion (25) is formed to engage with a specific portion (15) of the surface defining the first engagement portion (14) and receive the rotational moment. It is characterized by that.
- the insert mounting portion (21) has a mounting hole (23) formed on the base surface for mounting the cutting insert,
- the side wall surface of the insert mounting portion (21) faces the first side wall surface (21B) facing the outer peripheral side of the cutting edge replaceable cutting tool (1) and the front end side of the cutting edge replaceable cutting tool (1).
- the second engagement portion (25) is arranged in the direction (D1) facing the first side wall surface (21B) with respect to the central axis (AX1) of the mounting hole (23). It is formed on the side opposite to the (21B) side.
- the contact portion of the second engagement portion (25) that contacts the first engagement portion (14) is a direction (D2) facing the second side wall surface (21C). ) In the second side wall surface (21C) side with respect to the central axis of the mounting hole (23).
- the second engaging portion engages with the specific portion of the first engaging portion to receive the rotational moment, so that the rotational moment due to the cutting resistance acting on the cutting insert can be stabilized. As a result, the finished surface roughness can be improved.
- the perspective view of the blade-tip-exchange-type cutting tool which concerns on the 1st Embodiment of this invention The perspective view which looked at the cutting insert of FIG. 1 from the downward direction.
- Rear view of the cutting insert in the cutting tool of FIG. The top view of the cutting insert in the cutting tool of FIG.
- the perspective view of the body in the cutting tool of FIG. The front view of the body in the cutting tool of FIG.
- the enlarged view of the body insert mounting part in the cutting tool of FIG. The schematic diagram which shows the positional relationship of a 1st engaging part and a 2nd engaging part.
- the schematic diagram which shows the rotational moment added to the cutting insert in the cutting tool which concerns on this embodiment.
- FIG. 10A is an enlarged view in the circle of FIG. 10A.
- the perspective view which shows the other example of the blade-tip-exchange-type cutting tool which can apply this invention.
- a cutting edge replacement type cutting tool 1 (hereinafter referred to as a cutting tool 1) of this embodiment includes a cutting insert 10, a body 20 on which the cutting insert 10 is detachably mounted, and the cutting insert 10 as a body. And a bolt 30 to be fixed to 20.
- the definition of “body” in the following description conforms to the definition in JIS.
- the cutting tool 1 is a turning tool that cuts a workpiece while rotating around a rotation axis C.
- the outer shape of the upper surface 11 of the cutting insert 10 is circular.
- the side surface 12 is provided with a clearance angle, and the cutting insert 10 is a positive cutting insert.
- the cutting insert 10 has a rotationally symmetric shape with respect to a central axis J that is an axis passing through the center of gravity.
- the cutting insert 10 is formed with an attachment hole 18 penetrating the upper surface 11 and the lower surface 13, and a bolt 30 is inserted therethrough.
- the center axis of the mounting hole 18 and the center axis J of the cutting insert 10 coincide. Note that the pattern formed on the upper surface 11 serves as an indication of the position for corner change.
- a first engagement portion 14 defined by a recess is formed on the lower surface 13 of the cutting insert 10.
- the first engagement portion 14 is defined by a bottom surface portion 17 that surrounds the attachment hole 18 and a side wall surface that stands up from the outer peripheral portion of the bottom surface portion 17.
- the side wall surface is disposed between six engaging concave portions 15 curved in a regular manner (equally spaced) in the circumferential direction centered on the central axis J and the adjacent engaging concave portions 15. And six curved convex portions 16 curved in a convex shape.
- only a specific engaging recess 15 engages (contacts) with an engaging convex portion 25 ⁇ / b> A of the second engaging portion 25 described later.
- the first engaging portion 14 has a contour shape having rotational symmetry that is six-fold symmetric with respect to the central axis J of the cutting insert 10. Since the plurality of engaging recesses 15 are regularly arranged around the central axis J, a so-called corner change is possible in which a cutting edge that has become worn and cannot be used is replaced with another cutting edge. That is, the cutting insert 10 can be indexed.
- the body 20 includes an insert mounting portion 21 for detachably mounting the cutting insert 10, and the insert mounting portion 21 is formed by cutting out a part of the front end portion of the body 20. It is defined by a base surface 21A, a first side wall surface 21B facing the outer peripheral direction D1 side, and a second side wall surface 21C facing the front end direction D2 formed in a direction substantially orthogonal to the first side wall surface 21B. ing. A concave curved surface for supporting the side surface 12 of the cutting insert is formed on the first side wall surface 21B and the second side wall surface 21C. A screw hole (attachment hole) 23 is formed in the base surface 21 ⁇ / b> A, and the bolt 30 inserted through the cutting insert 10 is screwed into the screw hole 23 to clamp the cutting insert 10 on the insert attachment portion 21.
- a second engagement portion 25 is formed on the base surface 21A.
- the second engagement portion 25 is defined by a protrusion protruding from the base surface 21A, and is accommodated in the first engagement portion 14 described above when the cutting insert 10 is mounted on the insert attachment portion 21.
- the second engaging portion 25 includes an engaging convex portion 25A having a side wall surface that curves in a convex shape at one end thereof.
- the engagement convex portion 25A fits and engages with one engagement concave portion 15 specified in advance among the plurality of engagement concave portions 15 described above, whereby the cutting insert 10 attached to the insert mounting portion 21 is brought into the base surface 21A. It functions to receive the rotational moment acting on the cutting insert 10 to rotate above.
- a reinforcing portion 25B for reinforcing the second engaging portion 25 is formed in a portion of the side wall surface of the second engaging portion 25 that does not come into contact with the engaging recess 15 of the first engaging portion 14. ing.
- the reinforcing portion 25B has an escape portion that curves in a concave shape so as to prevent interference with the curved convex portion 16 of the first engaging portion 14.
- the engagement convex portion 25A of the second engagement portion is orthogonal to the base surface 21A, passes through the center of gravity of the cutting insert 10 attached to the insert attachment portion 21, and extends along the longitudinal direction of the body 20.
- the first region R1 is formed in the first region R1 opposite to the first side wall surface 21B side. That is, of the two regions of the base surface 21A that is divided by the first virtual plane P that is parallel to the rotation axis C of the body 20 and passes through the center of gravity of the outer peripheral contour of the cutting insert 10, the position is on the outer peripheral side of the body 20 Formed in the first region R1.
- the contact portion of the second engagement portion 25 that contacts the first engagement portion 14 is orthogonal to the first imaginary plane P and is mounted on the insert attachment portion 21.
- the two regions of the first region R1 divided into two by the second virtual plane Q that passes through the center of gravity of the insert 10 it is formed in the second region R2 located on the second side wall surface 21C side. .
- FIG. 8 shows the positional relationship between the second engagement portion 25 and the engagement recess 15 when the cutting insert 10 is fixed.
- the engaging convex portion 25 ⁇ / b> A of the second engaging portion 25 comes into contact with the inner wall of the specific engaging concave portion 15.
- the engaging convex portion 25A is formed slightly smaller than the size of the engaging concave portion 15 in order to facilitate the fitting into the engaging concave portion 15.
- the shape of a part of the wall surface matches the shape of the engagement recess 15 so that the engagement protrusion 25A can come into surface contact with the inner wall of the engagement recess 15.
- the reinforcing part 25B integrally formed with the engaging convex part 25A does not contact the first engaging part 14 at all.
- the center of rotation is a contact portion between the second engagement portion 25 and the engagement recess 15. Since the cutting tool 1 of the present embodiment has only one contact portion, even if a manufacturing dimensional error is accumulated, the position of the contact portion is somewhat within the inner wall surface of the specific engagement recess 15. It will only change. Thus, in the cutting tool 1 of the present embodiment, the position of the rotation center of the cutting insert 10 during processing becomes substantially constant. Therefore, the direction of the reaction force acting on the cutting insert 10 from the second engagement portion 25 is kept substantially constant.
- the second engagement portion 25 is formed in the first region R1 of the base surface 21A, so that the direction of the rotational moment due to the cutting resistance can always be kept constant. That is, when the second engaging portion 25 is formed in the region opposite to the first region R1, as shown in FIG. 9B, the rotational moment MT due to the back component force T and the rotational moment MF due to the feed component force F Is reversed. Therefore, when the magnitude relationship between the back component force T and the feed component force F changes during cutting, the moment of rotation applied to the cutting insert 10 for a moment becomes zero, and the clamping state of the cutting insert 10 becomes extremely unstable.
- the engagement convex portion 25A and the engagement concave portion 15 generated by the cutting resistance are formed by forming the engagement convex portion 25A in the second region R2 which is far from the main cutting edge E in the first region R1. Rotational moment around the contact area increases. As a result, the engaging convex portion 25A stably receives the rotational moment acting on the cutting insert 10, and the clamping force is also improved.
- the rotation of the cutting insert 10 can be effectively suppressed, and at the same time, the insert mounting portion 21.
- the effect of suppressing the rotation of the cutting insert 10 by the first and second side wall surfaces 21B and 21C is maximized.
- FIG. 10B is an enlarged view of the insert mounting portion of the body according to the second embodiment.
- the insert mounting portion 121 includes a shim 122 unlike the first embodiment.
- the shim 122 has substantially the same shape as the bottom surface in order to cover the entire bottom surface of the insert mounting portion 121.
- One surface of the shim 122 functions as a base surface 122A that supports the lower surface 13 of the cutting insert 10, and this base surface 122A has a second engagement with a structure similar to that of the second engagement portion 25 described above.
- a portion 125 is formed.
- the formation position of the second engagement portion 125 is the first region R1 of the base surface 122A of the shim 122, more preferably the second region R2, as in the first embodiment. Since the insert mounting portion 21 includes the shim 122, the material can be changed to a material different from the material of the body 20, and the rigidity of the second engaging portion 125 can be increased. By improving the rigidity of the second engaging portion 125, the second engaging portion 125 receives the rotational moment acting on the cutting insert 10 effectively and stably. In addition, when the second engagement portion 125 is damaged, only the shim 122 can be replaced. Therefore, the second embodiment is more economical than the first embodiment.
- the cutting edge-exchangeable cutting tool of the present invention is not limited to the above embodiment.
- the 1st engaging part 14 is demarcated by the recess formed in the lower surface 13 of the cutting insert 10, and the 2nd engaging part 25 is formed in 21 A of base surfaces, and is accommodated in a recess.
- the case has been described that is defined by a protrusion that is engageable with a portion of the side wall surface that defines the recess.
- the first engagement portion 14 is defined by a protrusion formed on the lower surface 13 of the cutting insert 10, and the second engagement portion 25 is formed on the base surface 21A. It is also possible to have a configuration that is defined by a recess having an engaging portion that is engageable with a portion of the side wall surface that houses and defines the protrusion.
- the shape of the cutting insert not only a positive type but also a negative type with no clearance angle on the side surface is possible. Moreover, there is no restriction
- the present invention can also be applied to C-type, D-type, S-type, T-type, W-type, V-type, and Y-type defined in “JIS-B4120-1998”.
- the contour shape of the recess that defines the first engaging portion 14 provided in the cutting insert may be a simple shape such as a circle or a square. In this case, if the cutting insert has n-fold symmetry (n is an integer of 2 or more) with respect to its axis, and a plurality of engaging recesses are formed, it is easy to change the corner of the cutting insert. .
- the recess has a shape having engaging recesses as in the above embodiment, there is no particular limitation on the number of engaging recesses. The number of engaging recesses may be more or less than six shown in the above embodiment.
- the protrusion has only one engaging protrusion, but the number of engaging protrusions is 2. There may be more than one. However, all the engaging convex portions need to be formed in the first region R1 of the base surface. In addition, it is preferable that the shape shown in the above-described embodiment, that is, only one engagement convex portion is provided and formed in the second region R2.
- FIG. 11 is a perspective view showing another example of a blade-exchangeable cutting tool to which the present invention can be applied.
- this invention was applied to the turning tool was demonstrated to the example, it is not limited to this.
- the present invention can also be applied to a turning tool in which the cutting insert 10 is detachably attached to the distal end portion of the body 220.
- the second engagement portion is j It is formed in the first region R1 (region on the outer peripheral side).
- the contact portion of the second engagement portion that contacts the first engagement portion is the second region of the two regions divided by the virtual plane Q of the first region R1.
- the second region R2 located on the side wall surface side that is, in the direction D2 facing the second side wall surface (longitudinal direction of the body 220), it is formed in the region on the second side wall surface side.
- the present invention is not limited to this, and the cutting insert is clamped by the bolt in the mounting hole of the base surface of the insert mounting portion.
- the present invention can also be applied to a case where clamping is performed by another clamping method different from the clamping method.
- the virtual planes P and Q pass through the center of gravity of the cutting insert.
- the virtual planes P and Q are the upper surfaces (rake faces) of the cutting insert. It is also possible to pass through the center of gravity.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
Description
前記切削インサート(10)の下面(13)を支持するベース面(21A)と、前記切削インサート(10)の側面(12)を支持する側壁面(21B,21C)とを有する、前記切削インサート(10)を着脱自在に装着するインサート取付部(21)を備えるボデー(20)と、
前記インサート取付部(21)に装着された切削インサート(10)を前記ベース面(21A)上で回転させるように当該切削インサート(10)に作用する回転モーメントを受け止める受け止め機構と、を有し、
前記受け止め機構は、前記切削インサート(10)の下面に形成された第1の係合部(14)と、
前記インサート取付部(21)のベース面(21A)に形成された第2の係合部(25)と、を含み、
前記第2の係合部(25)は、前記第1の係合部(14)を画定する面のうち、特定部分(15)に係合して前記回転モーメントを受け止めるように形成されている、ことを特徴とする。
前記インサート取付部(21)の側壁面は、前記刃先交換式切削工具(1)の外周側を向く第1の側壁面(21B)と、前記刃先交換式切削工具(1)の先端側を向く第2の側壁面(21C)とを含み、
前記第2の係合部(25)は、前記第1の側壁面(21B)の向く方向(D1)において、前記取付孔(23)の中心軸線(AX1)に対して当該第1の側壁面(21B)側とは反対側に形成されている。
図1に示すように、本実施形態の刃先交換式切削工具1(以下、切削工具1という)は、切削インサート10と、切削インサート10を着脱自在に装着するボデー20と、切削インサート10をボデー20に固定するボルト30とを備える。なお、以下の説明における「ボデー」の定義についてはJISにおける定義に準拠する。切削工具1は回転軸線Cを中心に回転しながらワークを切削する転削工具である。
図10Bは第2の実施形態に係るボデーのインサート取付部の拡大図である。図10Bに示すように、インサート取付部121は、第1の実施形態とは異なり、シム122を備えている。シム122はインサート取付部121の底面全体を覆うために、底面とほぼ同じ形状をなしている。シム122の一方の面は、切削インサート10の下面13を支持するベース面122Aとして機能し、このベース面122Aには、上述した第2の係合部25と同様の構造の第2の係合部125が形成されている。第2の係合部125の形成位置は、第1の実施形態と同様にシム122のベース面122Aの第1の領域R1、より好適には、第2の領域R2である。インサート取付部21がシム122を備えることにより、ボデー20の材質とは異なる材質に変更することが可能になり、第2の係合部125の剛性を高めることができる。第2の係合部125の剛性が向上することにより、第2の係合部125が切削インサート10に作用する回転モーメントを効果的かつ安定的に受け止める。また、第2の係合部125が破損したような場合には、シム122だけを交換することができるため、第2の実施形態は第1の実施形態に比べて経済的である。
10…切削インサート
11…上面
12…側面
13…下面
14…第1の係合部
15…係合凹部
16…湾曲凸部
17…底面部
18…取り付け孔
J…中心軸線
E…主切れ刃
C…回転軸線
20…ボデー
21…インサート取付部
21A…ベース面
21B…第1の側壁面
21C…第2の側壁面
23…ネジ孔
AX1…中心軸線
25…第2の係合部
25A…係合凸部
25B…逃げ部
122…シム
122A…ベース面
P…第1の仮想平面
Q…第2の仮想平面
Claims (11)
- 対向する上下面(11,13)と、該上下面の間で延びる側面(12)とを有する板状の切削インサート(10)と、
前記切削インサート(10)の下面(13)を支持するベース面(21A)と、前記切削インサート(10)の側面(12)を支持する側壁面(21B,21C)とを有する、前記切削インサート(10)を着脱自在に装着するインサート取付部(21)を備えるボデー(20)と、
前記インサート取付部(21)に装着された切削インサート(10)を前記ベース面(21A)上で回転させるように当該切削インサート(10)に作用する回転モーメントを受け止める受け止め機構と、を有し、
前記受け止め機構は、前記切削インサート(10)の下面に形成された第1の係合部(14)と、
前記インサート取付部(21)のベース面(21A)に形成された第2の係合部(25)と、を含み、
前記第2の係合部(25)は、前記第1の係合部(14)を画定する面のうち、特定部分(15)に係合して前記回転モーメントを受け止めるように形成されている、ことを特徴とする刃先交換式切削工具(1)。 - 前記インサート取付部(21)の側壁面は、前記刃先交換式切削工具(1)の外周側を向く第1の側壁面(21B)と、前記刃先交換式切削工具(1)の先端側を向く第2の側壁面(21C)とを含み、
前記ベース面(21A)に直交するとともに、前記インサート取付部(21)に装着された切削インサート(10)の上面(11)の重心を通過し、かつ、前記ボデー(20)の長手方向に沿った第1の仮想平面(P)により、2分割される当該ベース面(21A)の2つの領域のうち、前記第1の側壁面(21B)側とは反対側の第1の領域(R1)に形成されている、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(1)。 - 前記第2の係合部(25)のうち、前記第1の係合部(14)と当接する当接部分は、前記第1の領域(R1)のうち、前記第1の仮想平面(P)に直交するとともに、前記インサート取付部(21)に装着された切削インサート(10)の上面(11)の重心を通過する第2の仮想平面(Q)により2分割される当該ベース面(21A)の2つの領域のうち、前記第2の側壁面(21C)側に形成されている、ことを特徴とする請求項2に記載の刃先交換式切削工具(1)。
- 前記インサート取付部(21)の側壁面は、前記刃先交換式切削工具(1)の外周側を向く第1の側壁面(21B)と、前記刃先交換式切削工具(1)の先端側を向く第2の側壁面(21C)とを含み、
前記ベース面(21A)に直交するとともに、前記インサート取付部(21)に装着された切削インサート(10)の上面(11)の外形に内接する内接円の中心を通過し、かつ、前記ボデー(20)の長手方向に沿った第1の仮想平面(P)により、2分割される当該ベース面(21A)の2つの領域のうち、前記第1の側壁面(21B)側とは反対側の第1の領域(R1)に形成されている、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(1)。 - 前記第2の係合部(25)のうち、前記第1の係合部(14)と当接する当接部分は、前記第1の領域(R1)のうち、前記第1の仮想平面(P)に直交するとともに、前記内接円の中心を通過する第2の仮想平面(Q)により2分割される当該ベース面(21A)の2つの領域のうち、前記第2の側壁面(21C)側に形成されている、ことを特徴とする請求項4に記載の刃先交換式切削工具(1)。
- 前記インサート取付部(21)は、前記ボデー(20)と前記切削インサート(10)との間に介在するとともに、前記ベース面を画定するシム(122)を有し、
前記第2の係合部(25)は、前記シム(122)に形成されている、ことを特徴とする請求項1ないし5のいずれかに記載の刃先交換式切削工具(1)。 - 前記第1の係合部(14)は、前記切削インサート(10)の下面(13)に形成された凹所により画定され、
前記第2の係合部(25)は、前記ベース面(21A)に形成され、前記凹所に収容されて当該凹所を画定する側壁面の一部に係合可能な突起により画定される、ことを特徴とする請求項1ないし6のいずれかに記載の刃先交換式切削工具(1)。 - 前記第1の係合部(14)は、前記切削インサート(10)の下面(13)に形成された突起により画定され、
前記第2の係合部(25)は、前記ベース面(21A)に形成され、前記突起を収容して当該突起を画定する側壁面の一部と係合可能な係合部分を有する凹所により画定される、ことを特徴とする請求項1ないし6のいずれかに記載の刃先交換式切削工具(1)。 - 前記第1の係合部(14)は、前記切削インサート(10)の上面(11)の重心または内接円の中心を通る軸線に関してn回対称(nは2以上の整数)の輪郭形状を有する、ことを特徴とする請求項1ないし8のいずれかに記載の刃先交換式切削工具(1)。
- 前記インサート取付部(21)は、前記ベース面(21A)に形成された、前記切削インサート(10)を取り付けるための取付孔(23)を有し、
前記第2の係合部(25)は、前記取付孔(23)の中心軸線(AX1)に関して非回転対称に形成されている、ことを特徴とする請求項1ないし9のいずれかに記載の刃先交換式切削工具(1)。 - 前記1の係合部(14)は、前記切削インサート(10)の上面(11)の重心または内接円の中心を通る軸線(J)を中心とする円周に沿って等間隔に配列された、前記第2の係合部(25)とそれぞれ係合可能な複数の係合部分(15)を有する、ことを特徴とする請求項1ないし10のいずれかに記載の刃先交換式切削工具(1)。
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CN201280049086.6A CN103842119B (zh) | 2011-10-07 | 2012-10-05 | 刀头更换式切削工具 |
RU2014113348/02A RU2570682C1 (ru) | 2011-10-07 | 2012-10-05 | Режущий инструмент с заменяемой режущей кромкой |
JP2013537574A JP5812097B2 (ja) | 2011-10-07 | 2012-10-05 | 刃先交換式切削工具 |
EP12837720.7A EP2764939B2 (en) | 2011-10-07 | 2012-10-05 | Cutting tool with replaceable blade edge |
BR112014008368-1A BR112014008368B1 (pt) | 2011-10-07 | 2012-10-05 | ferramenta de corte com aresta de corte substituível |
US14/244,427 US9656334B2 (en) | 2011-10-07 | 2014-04-03 | Cutting-edge replaceable cutting tool |
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JPWO2013051703A1 (ja) | 2015-03-30 |
BR112014008368B1 (pt) | 2020-12-08 |
US20140212226A1 (en) | 2014-07-31 |
RU2570682C1 (ru) | 2015-12-10 |
US9656334B2 (en) | 2017-05-23 |
BR112014008368A2 (pt) | 2017-04-18 |
CN103842119B (zh) | 2016-12-14 |
EP2764939A4 (en) | 2015-05-20 |
EP2764939A1 (en) | 2014-08-13 |
CN103842119A (zh) | 2014-06-04 |
EP2764939B1 (en) | 2019-06-19 |
RU2014113348A (ru) | 2015-11-20 |
EP2764939B2 (en) | 2022-12-07 |
JP5812097B2 (ja) | 2015-11-11 |
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