CN107614173A - Indexable insert blade type cutting element - Google Patents
Indexable insert blade type cutting element Download PDFInfo
- Publication number
- CN107614173A CN107614173A CN201680030163.1A CN201680030163A CN107614173A CN 107614173 A CN107614173 A CN 107614173A CN 201680030163 A CN201680030163 A CN 201680030163A CN 107614173 A CN107614173 A CN 107614173A
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- CN
- China
- Prior art keywords
- cylindrical portion
- mounting seat
- hole
- pinching screw
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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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
- B23C5/1009—Ball nose end mills
-
- 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
-
- 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
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- 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
-
- 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
- B23C2210/00—Details of milling cutters
- B23C2210/16—Fixation of inserts or cutting bits in the tool
- B23C2210/165—Fixation bolts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
In the indexable insert blade type cutting element, cutting tip is by being seated in blade mounting seat and being clamped by pinching screw to be detachably arranged in blade mounting seat, pinching screw one end formed with external thread part, in the other end formed with the head with conical surface-shaped outer peripheral face, external thread part side between external thread part and head is formed with the first cylindrical portion, and the above-mentioned head side between external thread part and head is formed with the second cylindrical portion, formed with the first flexible portion between the first cylindrical portion and the second cylindrical portion.
Description
Technical field
The present invention relates to a kind of indexable insert blade type cutting element, wherein, cutting tip is formed in instrument by being seated at
Clamped in the blade mounting seat of the slit-shaped of the leading section of main body and by pinching screw, so as to the cutting tip detachably
It is installed in the blade mounting seat, wherein the cutting tip has the vane body formed with cutting edge.
The application is claimed priority based on the 2015-186854 patent applications in Japanese publication on the 24th of September in 2015, and
And here cite its content.
Background technology
As this indexable insert blade type cutting element, such as following cutting element is proposed in patent document 1：One
Kind indexable insert blade type cutting element, it is installed in the blade for the hollow bulb being arranged at slit-shaped in the leading section of tool body
Cutting tip is clamped on seat, and the cutting tip is fixed by secure component, wherein, in the blade mounting seat side of tool body
The center line being partly provided with relative to secure component corresponding with the head circular conical surface of secure component in portion and to tool body
The eccentric conical bearing surface of extreme direction afterwards, another blade mounting seat side surface part be provided with secure component cylindrical portion supported hole and
Its side wall and internal thread part, the internal thread part is connected and corresponding with the external thread part of secure component with the side wall, by by blade
Mounting seat side surface part carry out pressing and by secure component cylindrical portion carry out from the pin-and-hole side of cutting tip to instrument master
Cutting tip is fixed in the pressing of the rear end side of body, and by making the side wall of cylindrical portion supported hole and the cylindrical portion of secure component
Abut and be used as datum clamp face.
Here, in the indexable insert blade type cutting element described in the patent document 1, as described above by tool body
Blade mounting seat side surface part the center line partly set relative to secure component corresponding with secure component head circular conical surface
And to the eccentric conical bearing surface of extreme direction after tool body, and be screwed into secure component and make secure component with secure component
The lateral inclined mode of tool body rear end side in head is bent, so as to utilize the cylindrical portion of secure component to tool body rear end side
Press the pin-and-hole side of cutting tip.
Also, due to being used as reference for installation by making the side wall of cylindrical portion supported hole be abutted with the cylindrical portion of secure component
Face, therefore between cylindrical portion lower end when can be bent by so making secure component and cylindrical portion supported hole front side wall
Press to stablize the pressing force of the cutting tip as caused by cylindrical portion, additionally it is possible to for instrument using the various directions of process and greatly
Small load keeps high-precision cutting tip installation accuracy.
Patent document 1：No. 3971522 publications of Japanese Patent No.
But the secure component in the indexable insert blade type cutting element described in the patent document 1 has following problem：
It is difficult because formed with the cylindrical portion, therefore the rigidity of secure component is higher in the whole length between external thread part and head
To bend secure component.Further, since formed with cylindrical portion in whole length between external thread part and head, therefore cylinder
Contact area between portion and the pin-and-hole side of cutting tip is also larger, and in cylindrical portion to tool body rear end side pushpin
The frictional resistance during side of hole is also larger, so as to it is also possible to causing the offset movement of cutting tip when tightening secure component.
The content of the invention
The present invention proposes under this background, its object is to provide a kind of indexable insert blade type cutting element, its
Can realize as described above the pressing force of cutting tip it is stabilized simultaneously, additionally it is possible to be easy to secure component (pinching screw)
Bending, and the situation as the cutting tip offset movement when tightening can be prevented.
In order to solve the above problems and realize this purpose, in the indexable insert blade type cutting element of the present invention, cutting
Blade to be formed in the blade mounting seat of the slit-shaped of the leading section of tool body by being seated at and clamped by pinching screw, from
And the cutting tip is detachably installed in the blade mounting seat, wherein the cutting tip has formed with cutting
The vane body of sword, the indexable insert blade type cutting element be characterised by, in the vane body formed with：Take a seat
Face, it can be abutted with the mounting seat bottom surface of the blade mounting seat；And through hole, the vane body is penetrated for the clamping spiral shell
Nail insert, in two mounting seat walls relative to each other of the blade mounting seat, on a mounting seat wall formed with
Reference for installation hole and screwed hole, and in the tool body front of another mounting seat wall formed with coniform supporting surface,
The coniform supporting surface there is the center line relative to the screwed hole and to the eccentric center line of tool body rear end side,
The one end of the pinching screw is formed with the external thread part being screwed into the screwed hole, in the other end formed with head, institute
State head have can with the conical surface-shaped outer peripheral face of the coniform supporting surface sliding contact, in the external thread part and the head
Between the external thread part side formed with the first cylindrical portion, the outer peripheral face of first cylindrical portion and the reference for installation hole
The inner peripheral surface of tool body front abuts, and the head side between the external thread part and the head is formed with second
Cylindrical portion, the outer peripheral face of second cylindrical portion and the inner peripheral surface of the tool body rear end side in the through hole of the vane body
Abut, be less than first cylindrical portion and second cylindrical portion formed with external diameter between first cylindrical portion and second cylindrical portion
External diameter the first flexible portion.
In the indexable insert blade type cutting element being constructed so as to, when installing cutting tip by being screwed into pinching screw
When, the outer peripheral face of the first cylindrical portion in the external thread part side of pinching screw and the tool body front in the reference for installation hole
Inner peripheral surface sliding contact, therefore these inner and outer circumferential surfaces are as in the indexable insert blade type cutting element described in patent document 1
Datum clamp face play a role.Therefore, it is same with the indexable insert blade type cutting element described in patent document 1, can
The pressing force of stable cutting tip, additionally it is possible to which the load in various directions and size during for machining remains high-precision and cut
Paring blade installation accuracy, and obtain higher machining accuracy.In addition, the periphery of the second cylindrical portion of the head side of pinching screw
Face presses the through hole of cutting tip by the bending of pinching screw to tool body rear end side, by the face of taking a seat of vane body
It is pressed on the mounting seat bottom surface of blade mounting seat.
Also, in the indexable insert blade type cutting element of said structure, further in this first cylindrical portion and second
It is less than first cylindrical portion and the first flexible portion of the external diameter of second cylindrical portion formed with external diameter between cylindrical portion, passes through to be formed
This first flexible portion, the rigidity of pinching screw can be reduced in necessary scope, therefore clamp and fixing cutting tip
When can be readily bent pinching screw.It is thus possible to enough be screwed into power and conscientiously and be stably installed cutting tip with less
In blade mounting seat.
Further, since the external diameter of first flexible portion is less than the external diameter of the first cylindrical portion and the second cylindrical portion, thus this
One flexible portion will not contact with the through hole of vane body, can reduce the contact area between pinching screw and through hole.And
And due to pinching screw can also be reduced to frictional resistance during tool body rear end side pressing through hole with this, therefore can prevent
The only situation as the vane body offset movement when tightening pinching screw.Therefore entering for cutting tip installation accuracy can be realized
One step high precision int, can further improve machining accuracy.
Furthermore it is preferred that external diameter is also formed between second cylindrical portion and the head less than second cylindrical portion
Second flexible portion of external diameter.Thereby, it is possible to be more flexurally compliant pinching screw, and pinching screw can also be further reduced with passing through
Contact area between through hole.
Furthermore it is preferred that in the state of the cutting tip is clamped by being screwed into the pinching screw, first circle
Border between cylinder portion and first flexible portion is located at the elongated surfaces of one mounting seat wall of the blade mounting seat
On, or from the elongated surfaces in the reference for installation hole.Thus, because first cylindrical portion will not be with vane body
Through hole contacts, thus gap for example between the first cylindrical portion and the through hole of vane body it is less in the case of be screwed into folder
During tight screw, the peace of vane body can be prevented by the contact between the first cylindrical portion and the through hole of vane body
Fill runout accuracy error.
As described above, in accordance with the invention it is possible to make the pressing force of cutting tip as caused by pinching screw steady
Surely while change, additionally it is possible to by cutting tip conscientiously and accurately be arranged on blade mounting seat on, it is more high-precision so as to realize
The machining of degree.
Brief description of the drawings
Fig. 1 is the side view of the leading section for the indexable insert blade type cutting element for representing one embodiment of the present invention.
Fig. 2 is the ZZ sectional views in Fig. 1.
Embodiment
Fig. 1 and Fig. 2 is the figure for representing one embodiment of the present invention.The indexable insert blade type cutting element of present embodiment
For indexable insert blade type slotting cutter, in particular ball end mill, i.e. cutting tip 3 is seated to be formed centered on axes O
The blade mounting seat 2 of the slit-shaped of the leading section (left part in Fig. 1 and Fig. 2) of the generally cylindrical tool body 1 of profile
Above and by pinching screw 4 clamp and (cutting tip 3 is clamped in blade mounting seat 2 by fastening pinching screw 4), so as to institute
State cutting tip 3 to be detachably arranged in blade mounting seat 2, cut wherein the cutting tip 3 has formed with arc-shaped
Cut sword 3a vane body 3b.In this indexable insert blade type cutting element, the handle of a knife (not shown) of the rear end side of tool body 1
Portion is held on the main shaft of lathe, so as to the indexable insert blade type cutting element around axes O rotate while generally to axle
The direction that line O intersects is sent out, and carries out machining to workpiece such as metal patterns by above-mentioned cutting edge 3a.In addition, in this reality
Apply in mode, by it is in the bearing of trend of axes O, from the shank section of tool body 1 towards the direction of blade mounting seat 2 be referred to as before
Side (left side in Fig. 1 and Fig. 2), the direction from blade mounting seat 2 towards shank section is referred to as rear end side (in Fig. 1 and Fig. 2
Right side).In addition, the direction orthogonal with axes O is referred to as radially.The direction of close axes O in radial direction is referred to as footpath inwardly side,
The direction that will be far from axes O is referred to as footpath outward.
, mainly can with possess pinching screw 4 of the thread size in the range of M2 to M8 in addition, in the present embodiment
Transposition blade formula cutting element is object, but the indexable insert blade type for possessing the pinching screw 4 that thread size is M8 is cut below
The instrument of cutting illustrates.In addition, the thread size of the pinching screw 4 of the indexable insert blade type cutting element of the present invention does not limit
In above range.
The vane body 3b of cutting tip 3 is formed as tabular by hard materials such as hard alloy, and possesses two each other
Parallel side 3c and the take a seat face 3d vertical with these sides 3c, the cutting tip 3 is with above-mentioned arc-shaped (substantially semicircle shape)
Leading section periphery (front and footpath are outward) prominent and cutting edge 3a from cutting edge 3a to tool body 1 around axes O revolve
Then into rotational trajectory in the axes O with center hemispherical mode be arranged on blade mounting seat 2 on.Change speech
It, vane body 3b is arranged in blade mounting seat 2 in a manner of the cutting edge 3a circular arcs for being in are centrally through axes O.Separately
Outside, the through hole 3e formed with circular section on vane body 3b, the through hole 3e, which has, passes through above-mentioned cutting edge 3a institutes
The center line and insertion vane body 3b of the approximate centre for the circular arc for being in, and in the 3c upper sheds of above-mentioned two side.
On the other hand, tool body 1 and pinching screw 4 are by hardness of the hardness less than vane body 3b and being capable of elastic deformation
The metal material such as steel formed.Wherein, the leading section of tool body 1 is formed be provided with the situation of cutting tip 3
Under it is hemispherical centered on intersection point between axes O and vane body 3b through hole 3e above-mentioned center line.But the work
The radius for the hemisphere that the radius ratio cutting edge 3a for the hemisphere that the leading section of tool main body 1 is in above-mentioned rotational trajectory is in is slightly smaller.
As shown in Fig. 2 from the direction orthogonal with the above-mentioned center line of axes O and vane body 3b through hole 3e
When, the insert mounting seat 2 for being formed at the leading section of this tool body 1 is formed in the front of tool body 1 with U
The slit-shaped of font opening, i.e. the blade mounting seat 2 possess：Two relative mounting seat wall 2a, 2b, it is parallel to each other and also with
Axes O is parallel；With the mounting seat bottom surface 2c towards the front of tool body 1, the mounting seat bottom surface 2c and these mounting seats
Wall 2a, 2b are vertical and orthogonal with axes O.
Two mounting seat walls 2a, 2b are located at the distance being equal to each other away from axes O, these mounting seat walls 2a, 2b it
Between be set as can be with so that vane body 3b above-mentioned two side 3c be slided respectively with two mounting seat walls 2a, 2b at interval
The mode of contact is embedded in vane body 3b size.Thus by embedded vane body 3b and make above-mentioned face 3d and the mounting seat of taking a seat
Bottom surface 2c is abutted, so as to which cutting tip 3 is landed in blade mounting seat 2 in a manner of through hole 3e center line is orthogonal with axes O
On.
In addition, first mounting seat wall (Fig. 2 of a mounting seat wall in as two mounting seat walls 2a, 2b
In downside mounting seat wall) on 2a, as follows formed with reference for installation hole 5 and screwed hole 6：I.e. as described above
Make in the state of cutting tip 3 is landed in blade mounting seat 2, the reference for installation hole 5 and screwed hole 6 faces and the first installation
The opening portion of above-mentioned through hole 3e in the vane body 3b of seat wall 2a sliding contacts side 3c.In the present embodiment,
Reference for installation hole 5 is formed in mounting seat wall 2a upper sheds, and in the bottom hole (footpath is outward) in the reference for installation hole 5
Formed with screwed hole 6.
Wherein, screwed hole 6 extends in a manner of its center line L1 is orthogonal with axes O.In addition, reference for installation hole 5 is in along axle
The elongated hole-shape (run-track shaped) of line O directions extension, i.e. reference for installation hole 5 is formed on the section parallel with mounting seat wall 2a
For a circle is passed through into the side of the width equal with the diameter between its two semicircle after diametrically splitting along axes O direction
Shape (square) is come the shape that is formed by connecting.The semicircle of front in these semicircles positioned at tool body 1 is centrally located at
On the center line L1 of screwed hole 6, the inner peripheral surface along the semicircular cylinder planar in the reference for installation hole 5 of the semicircle of the front is instrument master
The datum clamp face 5a of the side of body 1.In addition, internal diameter (screw thread of the internal diameter (said one diameter of a circle) of these semicircles than screwed hole 6
The diameter at the screw thread bottom (ネ ジ paddy) in hole 6) it is slightly larger.
On the other hand, the second mounting seat of another mounting seat wall in as two mounting seat walls 2a, 2b
Wall (the mounting seat wall of the upside in Fig. 2) 2b is upper formed with recessed coniform hole 7, so as on the outer peripheral face of tool body 1
Opening.Wherein, the recessed coniform hole 7 is away from the second mounting seat wall 2b and with towards the leading section periphery of tool body 1
Side (upside in Fig. 2, footpath is outward) and internal diameter becomes larger.The coniform hole 7 is in the instrument parallel with mounting seat wall 2b
Be formed toroidal on the section of main body 1, the internal diameter of the circle with the outer circumferential side (footpath is outward) towards tool body 1 and by
Gradual change is big.
In addition, the semicircle conical surface of the semicircle of the front along tool body 1 in the recessed coniform hole 7 is in present embodiment
Coniform supporting surface 7a, the center line L2 of the coniform supporting surface 7a is orthogonal with axes O, and with the center line of screwed hole 6
L1 compares the rear end side bias slightly towards tool body 1.In addition, center line L2 is parallel with center line L1.In addition, in the recessed circular cone
The bottom hole (the inside square end in footpath in recessed coniform hole 7) in shape hole 7 between the second mounting seat wall 2b, with the recessed coniform phase of hole 7
Mode even is more than the long hole portion 7b of the internal diameter in reference for installation hole 5 formed with internal diameter.Long hole portion 7b is formed a circle is (straight
Footpath is more than the circle of half circular diameter in reference for installation hole 5) pass through between its two semicircle after diametrically splitting along axes O direction
The square shape to be formed by connecting of the width equal with the diameter.Also, the center of long hole portion 7b above-mentioned two semicircle
Midpoint is located on the center line L1 of screwed hole 6.Long hole portion 7b is as follows in the second mounting seat wall 2b upper sheds：That is the length
Hole portion 7b is in face of the opening portion with the through hole 3e in the vane body 3b of the second mounting seat wall 2b sliding contacts side 3c.
Pinching screw 4 is in one end (lower portion in Fig. 2) formed with the external thread part being screwed into above-mentioned screwed hole 6
4a, and external thread part 4a is being screwed into spiral shell formed with head 4b, head 4b in the other end (upper portion in Fig. 2)
Can be with above-mentioned coniform supporting surface 7a sliding contacts and with towards the other end side and gradual expanding circle during pit 6
The outer peripheral face of conical surface shape.In addition, it is being screwed into formed with connecting hole 4c, connecting hole 4c on head 4b end face or is unclamping clamping
Engage during screw 4 with behaviour's action tools such as spanners.
In addition, between these external thread parts 4a and head 4b, be provided with external thread part 4a one end side formed with
First cylindrical portion 4d.First cylindrical portion 4d is in cylinder planar of its outer peripheral face centered on the center line of pinching screw 4, and this
One cylindrical portion 4d external diameter is set to, and conduct above-mentioned installation than reference for installation hole 5 more slightly larger than external thread part 4a external diameter
The internal diameter of the inner peripheral surface of reference plane 5a front is small and difference is extremely trickle.External thread part 4a is being screwed into as described above
During screwed hole 6, the first cylindrical portion 4d outer peripheral face can be with datum clamp face 5a sliding contacts.In the present embodiment,
The connecting portion for including incomplete thread portion is provided between one cylindrical portion 4d and external thread part 4a.It is preferred that the external diameter of connecting portion is less than
External thread part 4a bottom footpath (Gu Jing), and the connecting portion has outside than the first flexible portion 4f described later and the second flexible portion 4g
The small external diameter in footpath.
On the other hand, it is being provided between external thread part 4a and head 4b (between the first cylindrical portion 4d and head 4b)
Centerline direction and first cylindrical portion 4d interval of the head 4b the other end side along pinching screw 4 and formed with the second circle
Cylinder portion 4e.Second cylindrical portion 4e outer peripheral face is also in the cylinder planar centered on the center line of pinching screw 4, second circle
Cylinder portion 4e external diameter is set to equal with the first cylindrical portion 4d external diameter.In addition, in the present embodiment, the second cylindrical portion 4e
Length on the centerline direction of pinching screw 4 is set to longer than the first cylindrical portion 4d.In addition, the first cylindrical portion 4d exists
The preferred scope of length on the centerline direction of pinching screw 4 is different according to the thread size of pinching screw 4.Such as such as
In the case that the thread size of the such pinching screw 4 of present embodiment is M8, the first cylindrical portion 4d above-mentioned length is preferably the
The 10~50% of two cylindrical portion 4e length, more preferably 20~40%, but it is not limited to this.
Also, between these the first cylindrical portion 4d and the second cylindrical portion 4e formed with external diameter be less than the first cylindrical portion 4d and
First flexible portion 4f of the second cylindrical portion 4e external diameter.In addition, in the present embodiment, in the second cylindrical portion 4e and pinching screw
The second flexible portion 4g formed with external diameter of the external diameter less than the second cylindrical portion 4e between 4 head 4b.These first flexible portions 4f
And second flexible portion 4g be also in cylinder planar of its outer peripheral face centered on the center line of pinching screw 4.In the present embodiment,
The first flexible portion 4f and second flexible portion 4g external diameter (diameter) are equal to each other, the first flexible portion 4f and the second flexible portion 4g
External diameter (diameter) difference between the first cylindrical portion 4d and the second cylindrical portion 4e is such as 0.08~0.5mm or so.In addition, at this
In embodiment, length of the second flexible portion 4g on the centerline direction of pinching screw 4 is set to than the first flexible portion 4f
It is longer.
In addition, by be screwed into pinching screw 4 (by making the external thread part 4a of pinching screw 4 be screwed togather with screwed hole 6) and
In the state of cutting tip 3 is clamped in blade mounting seat 2, as shown in Fig. 2 the first cylindrical portion 4d and the first flexible portion 4f it
Between border be located in the first mounting seat wall 2a elongated surfaces of the blade mounting seat 2, or positioned at upper from the elongated surfaces
State in reference for installation hole 5.In addition, in the present embodiment, equally cutting tip 3 is clamped by being screwed into pinching screw 4
In the state of in blade mounting seat 2, centers of the second cylindrical portion 4e on the centerline direction of pinching screw 4 is set to greatly
The center for causing the thickness direction positioned at vane body 3b is in the above-mentioned axes O of tool body 1.As described above, in present embodiment
Pinching screw 4 external thread part 4a and head 4b between, connecting portion, the first cylindrical portion 4d, the first flexible portion 4f, the second cylinder
Portion 4e and the second flexible portion 4g is set to be sequentially connected from external thread part 4a sides on the central axis direction of pinching screw 4.
In addition, for vane body 3b through hole 3e, the position of through hole 3e center line is set as follows
Put and internal diameter：Abutted as described above by the face 3d that makes to take a seat with mounting seat bottom surface 2c to make vane body 3b be landed in knife
In the state of in piece mounting seat 2, when starting to be screwed into screwed hole 6 by external thread part 4a, in the first cylindrical portion 4d and the second cylinder
Portion 4e outer peripheral face is spaced apart very small interval with the inner peripheral surface of the through hole 3e rear end side part of tool body 1.At this
In embodiment, through hole 3e internal diameter is roughly the same with the internal diameter in reference for installation hole 5.
This indexable insert blade type cutting element passes through as described above with vane body 3b through hole 3e center line
Cutting tip 3 is embedded in blade mounting seat 2 by the mode orthogonal with axes O, and the face 3d that makes to take a seat abuts with mounting seat bottom surface 2c
And the cutting tip 3 is taken a seat, afterwards by the way that pinching screw 4 is inserted into through hole 3e from recessed coniform hole 7, and by outer spiral shell
Line portion 4a is screwed into screwed hole 6 and assembles the cutting tip 3.
Although when starting to be screwed into screwed hole 6 by external thread part 4a, in the center line and screwed hole 6 that clamp screw thread 4
Heart line L1 is coaxial, but the head 4b outer peripheral face when pinching screw 4 and the coniform supporting surface 7a sliding contacts in recessed coniform hole 7
When, due to the coniform supporting surface 7a center line L2 compared with the center line L1 of screwed hole 6 slightly towards the rear end of tool body 1
The lateral deviation heart, therefore pinching screw 4 starts to bend in a manner of the rear end side of head 4b to tool body 1 is toppled over.
Also, pinching screw 4 is bent if so, then the other end side (head 4b sides) in its second cylindrical portion 4e is outer
Side face is abutted with the inner peripheral surface of the through hole 3e of cutting tip 3 rear end side of tool body 1, and vane body 3b is pressed into
The mounting seat bottom surface 2c of blade mounting seat 2.In addition, at the same time, because the head 4b of pinching screw 4 is pushed to coniform branch
Support face 7a, narrower intervals between two mounting seat walls 2a, 2b of blade mounting seat 2 and press vane body 3b two sides
Face 3c, by these pressings, cutting tip 3 is clamped and is fixed in blade mounting seat 2.
Here, due to when pinching screw 4 starts bending, the first cylindrical portion 4d outer peripheral face and the work in reference for installation hole 5
Have the datum clamp face 5a sliding contacts of the front of main body 1, therefore pinching screw 4 continues to bend as follows：That is, head 4b
Side is with the parts of datum clamp face 5a sliding contacts to be fulcrum in first cylindrical portion 4d outer peripheral face to tool body 1
Rear end side tilts.That is, because the part of first cylindrical portion 4d and datum clamp face 5a sliding contacts is as the side of pinching screw 4
Datum clamp face play a role, and by the datum clamp face 5a of the side of tool body 1, in the front of tool body 1
And outer circumferential side (footpath is outward) constraint pinching screw 4, therefore no matter cutting edge 3a is in any direction to cutting in machining
Blade 3 applies load, and also cutting tip 3 can be firmly held in blade mounting seat 2.
In addition, in the indexable insert blade type cutting element of said structure, the pinching screw 4 the first cylindrical portion 4d with
First formed with external diameter of the external diameter less than these the first cylindrical portion 4d and the second cylindrical portion 4e between second cylindrical portion 4e is flexible
Portion 4f.Therefore, it is possible to which first flexible portion 4f rigidity is set in necessary scope to be less than the first cylindrical portion 4d and second
Cylindrical portion 4e rigidity, so can be readily bent pinching screw 4.The first flexible portion 4f of this effect can fully be obtained
Length on the centerline direction of pinching screw 4 is different according to the thread size of pinching screw 4.For example, in such as this implementation
In the case that the thread size of the such pinching screw 4 of mode is M8, the first flexible portion 4f above-mentioned length is preferably the first cylinder
The 100~500% of portion 4d length, more preferably 200~400%, but it is not limited to this.
It is additionally, since the first cylinder of bending fulcrums of the first flexible portion 4f with turning into pinching screw 4 as described above
Portion 4d is adjacent, can be more flexurally compliant pinching screw 4.Therefore, it is possible to will be by making spanner etc. grasp action tool and connecting hole
It is smaller that 4c, which engages and rotates the power control that is screwed into when external thread part 4a is screwed into screwed hole 6 by pinching screw 4, and can
Pinching screw 4 is set effectively to bend and cutting tip 3 is firmly secured in blade mounting seat 2.
Further, since first flexible portion 4f external diameter is less than the second cylinder abutted with vane body 3b through hole 3e
Portion 4e external diameter, therefore first flexible portion 4f will not contact with through hole 3e, so as between pinching screw 4 and through hole 3e
Contact area is smaller.Thus, it is also possible to by pinching screw 4 abutted with through hole 3e and to tool body 1 rear end side by push type broach
Frictional resistance control between pinching screw 4 and through hole 3e during piece main body 3b can be prevented will be complete to be smaller
Vane body 3b offset movement when tightening of pinching screw 4 before fixed cutting tip 3, and can be with higher precision
Cutting tip 3 is arranged in blade mounting seat 2 and improves machining accuracy.
In addition, in the present embodiment, external diameter is also formed between the second cylindrical portion 4e and head 4b of pinching screw 4
Second flexible portion 4g of the external diameter less than the second cylindrical portion 4e.Therefore, it is possible to make pinching screw 4 by the second flexible portion 4g
It is more flexurally compliant, and can further reduces the contact area between the pinching screw 4 and vane body 3b through hole 3e
And further reduce frictional resistance.
Moreover, by so pinching screw 4 another side (head 4b sides) the second cylindrical portion 4e and head 4b it
Between form the second flexible portion 4g that will not contact with through hole 3e so that the whole part between external thread part 4a and head 4b
Compared with situation for the cylindrical portion contacted with through hole 3e, can make because of the bending of pinching screw 4 and the second cylindrical portion 4e
What outer peripheral face contacted with through hole 3e is located proximate to the first cylindrical portion 4d of the datum clamp face as pinching screw 4 one end
Side (external thread part 4a sides) outer peripheral face.Therefore, even if the amount of bow of pinching screw 4 is identical, can also strengthen with the one end side
Outer peripheral face be point action in the pressing force on the position that the second cylindrical portion 4e contacts with through hole 3e, and can be by bite
Piece 3 is more securely fixed in blade mounting seat 2.
In addition, in the present embodiment, cutting tip 3 is being clamped in blade mounting seat 2 by being screwed into pinching screw 4
In the state of upper, centers of the second cylindrical portion 4e on the centerline direction of pinching screw 4 is set to be located substantially at blade master
The center of body 3b thickness direction.Therefore, it is possible to equal on insert main body 3b thickness direction (left and right directions in Fig. 2)
Weighing apparatus ground pressing cutting tip 3, so as to which the cutting tip 3 is more stably mounted in blade mounting seat 2.In addition, the second cylinder
The preferred scope of length of the portion 4e on the centerline direction of pinching screw 4 is different according to the thread size of pinching screw 4.Example
Such as, in the case where the thread size of pinching screw 4 as in the present embodiment is M8, the second cylindrical portion 4e above-mentioned length is excellent
Elect the 30~70% of vane body 3b thickness the distance between (two side 3c) as, more preferably 40~60%, but not
It is defined in this.
It is but such as natively small in the external diameter of such as pinching screw 4 and clamping spiral shell only can be made by the first flexible portion 4f
The fully bending of nail 4 or in the case of reducing contacts area between pinching screw 4 and through hole 3e, can not also be formed this second
Flexible portion 4g, but by making the second cylindrical portion 4e directly extend to another side to be connected with head 4b.In addition, in contrast
Ground, can also be between the external thread part 4a and head 4b of pinching screw 4 formed with the flexible portion of more than three.
On the other hand, in the present embodiment, cutting tip 3 is being clamped in blade peace by being screwed into pinching screw 4
In the state of filling on seat 2, the border between the first cylindrical portion 4d and the first flexible portion 4f is located at the first installation of blade mounting seat 3
In seat wall 2a elongated surfaces, or from the elongated surfaces in reference for installation hole 5.Therefore, the first cylindrical portion 4d will not be with
Through hole 3e is contacted.
Also, due to when continuing to be screwed into pinching screw 4, ensuring gap between through hole 3e and the first flexible portion 4f,
Therefore the part towards the front of tool body 1 being avoided that in the first flexible portion 4f outer peripheral face contacts with through hole 3e.Cause
This, by being avoided the contact, can prevent from producing installation runout precision because vane body 3b rotates centered on through hole 3e
Deviation.
The center by recessed coniform hole 7 of the effect above can be fully obtained by making pinching screw 4 suitably bend
Line L2 is different according to the thread size of pinching screw 4 from inner peripheral surface angulation.For example, pressing from both sides as in the present embodiment
In the case that the thread size of tight screw 4 is M8, the angle is preferably 10~40 °, more preferably 15~35 °.In addition, passing through
Pinching screw 4 is screwed into the state of cutting tip 3 is clamped in blade mounting seat 2, coniform supporting surface 7a and clamps spiral shell
The preferred model of the length on the center line L2 directions in recessed coniform hole 7 in the region that the head 4b of nail 4 outer peripheral face is contacted
Enclose also according to the thread size of pinching screw 4 and different.For example, in the thread size of pinching screw 4 as in the present embodiment
In the case of M8, the length is preferably the 5~45% of the length of pinching screw 4, more preferably 15~35%.
In addition, in embodiments, the rotational trajectory on the cutting edge 3a to cutting tip 3 is in hemispherical indexable
The situation of the blade type ball end mill application present invention is illustrated, but can also be to being both indexable insert blade type slotting cutter
Such as following square toes slotting cutter or radius end mill application the present invention, wherein, the square toes slotting cutter be cutting edge by along with
The shear blade and be connected with the outer circumference end (holding outward in footpath) of the shear blade and rotated around axes O that axes O generally perpendicular direction extends
Rotational trajectory in the slotting cutter of the peripheral edge construction of cylinder planar centered on axes O, the radius end mill is at this
The slotting cutter of the basil formed with arc-shaped on the corner that a little peripheral edges are intersected with shear blade.Further, it is also possible to beyond to slotting cutter
Cutting element application the present invention, such as can also to indexable insert blade type drill bit application the present invention.
Embodiment
Then, embodiment is enumerated to illustrate effect caused by following structure：I.e. by be screwed into pinching screw 4 and
In the state of cutting tip 3 is clamped in blade mounting seat 2, the side between above-mentioned first cylindrical portion 4d and the first flexible portion 4f
Boundary is located in the first mounting seat wall 2a elongated surfaces of blade mounting seat 2, or positioned at reference for installation hole 5 from the elongated surfaces
It is interior.In the present embodiment, the pinching screw 4 based on above-mentioned embodiment is made, measurement will be cut by the pinching screw 4
The cutting edge 3a of vane body 3b when blade 3 is initially installed to the blade mounting seat 2 of tool body 1 positional precision using as
A reference value, then it will be set to 1 by unclamping pinching screw 4 to install the operation of cutting tip 3 after dismounting of cutting blade 3 again
Individual cycle, the 10th cycle of measurement, the 100th cycle, the installation runout precision of cutting tip 3 under the 200th cycle, and and benchmark
Value is compared.
Here, for the pinching screw 4 in the present embodiment, external thread part 4a is M8 × 0.75mm two level screw thread,
First cylindrical portion 4d and the second cylindrical portion 4e a diameter of 8mm's, the first flexible portion 4f and the second flexible portion 4g is a diameter of
7.7mm, head 4b maximum gauge are 12mm and minimum diameter is 7.7mm.Center lines of the first cylindrical portion 4d in pinching screw 4
Length on direction is 1mm, and the first flexible portion 4f length is 3.08mm, and the length of the second cylindrical portion is 3.6mm, and second is flexible
Portion 4g length is 1.6mm, and head 4b length is 7.9mm.Head 4b coniform outer peripheral face is relative to pinching screw 4
The angle of inclination of centerline direction is 20 °.In addition, for cutting tip 3, between vane body 3b two side 3c
Thickness is 7.2mm, and the cutting edge 3a of arc-shaped radius is 15mm, and through hole 3e diameter is calculated as 8.008mm with measured value.Work
The datum clamp face 5a of tool main body 1 has above-mentioned run-track shaped, forms the half run-track shaped diameter of a circle in terms of measured value
For 8.008mm.Also, in the state of cutting tip 3 is clamped in blade mounting seat 2 by being screwed into pinching screw 4, folder
Tightly first mounting seat wall 2a of the border between the first cylindrical portion 4d and the first flexible portion 4f of screw 4 from blade mounting seat 2
Elongated surfaces rise slightly within reference for installation hole 5.
In addition, the installation runout precision as cutting tip 3, during initially installing cutting tip 3 using pinching screw 4
Pass through the cutting edge 3a on the cutting edge 3a of the arc-shaped in Fig. 1 center and the straight line vertical with the axes O of tool body 1
Both ends at intervals of a reference value, the 10th cycle of measurement, the 100th cycle, the difference of the above-mentioned interval under the 200th cycle and a reference value.
In addition, as comparative example corresponding with above-described embodiment, indexable insert blade type cutting element as described in Patent Document 1 is used
The such external thread part of secure component and head between whole part be the pinching screw of diameter 8mm single cylindrical portion, come
Repeat to dismantle after clamping cutting tip 3 same as described above as the cutting tip 3 cycle, the 10th cycle of measurement,
Above-mentioned interval under 100th cycle, the 200th cycle, and using above-mentioned interval and as between above-mentioned under the 1st cycle of a reference value
The installation runout precision of cutting tip 3 is set to every its difference.
As a result, in a comparative example, the difference at above-mentioned interval and a reference value under the 10th cycle is 1 μm, under the 100th cycle
The difference of above-mentioned interval and a reference value is 12 μm, and the difference at above-mentioned interval and a reference value under the 200th cycle is 11 μm, is confirmed because anti-
Again carry out cutting tip 3 installation and disassembling section and produce installation runout accuracy error.On the other hand, in embodiment,
The difference at above-mentioned interval and a reference value under the 10th cycle is 0 μm, deviation unconfirmed, even in the 100th cycle and the 200th cycle
Under, the difference of above-mentioned interval and a reference value is also 1 μm, it is seen that installation runout accuracy error is controlled.
Industrial applicability
According to the indexable insert blade type cutting element of the present invention, the pressing force of cutting tip can be made stabilized while made
Pinching screw is readily bent, and can prevent the cutting tip offset movement when tightening.
Description of reference numerals
1 tool body
2 blade mounting seats
2a, 2b mounting seat wall
2c mounting seats bottom surface
3 cutting tips
3a cutting edges
3b vane bodies
3c sides
3d takes a seat face
3e through holes
4 pinching screws
4a external thread parts
4b heads
4c connecting holes
The cylindrical portions of 4d first
The cylindrical portions of 4e second
The flexible portions of 4f first
The flexible portions of 4g second
5 reference for installation holes
5a datum clamp faces
6 screwed holes
7 recessed coniform holes
The coniform supporting surfaces of 7a
The long hole portions of 7b
The axis of O tool bodies 1
The center line of L1 screwed holes 6
The coniform supporting surface 7a of L2 center line
Claims (3)
1. a kind of indexable insert blade type cutting element, cutting tip is by being seated at the slit to be formed in the leading section of tool body
Clamped in the blade mounting seat of shape and by pinching screw, so as to which the cutting tip is detachably installed on the blade installation
On seat, wherein the cutting tip has the vane body formed with cutting edge, the spy of the indexable insert blade type cutting element
Sign is,
In the vane body formed with：Take a seat face, can be abutted with the mounting seat bottom surface of the blade mounting seat；And insertion
Hole, the vane body is penetrated so that the pinching screw is inserted,
In two mounting seat walls relative to each other of the blade mounting seat, formed with installation on a mounting seat wall
Datum hole and screwed hole, and in the tool body front of another mounting seat wall formed with coniform supporting surface, it is described
Coniform supporting surface there is the center line relative to the screwed hole and to the eccentric center line of tool body rear end side,
The pinching screw one end formed with the external thread part being screwed into the screwed hole, in the other end formed with head
Portion, the head have can with the conical surface-shaped outer peripheral face of the coniform supporting surface sliding contact,
The external thread part side between the external thread part and the head formed with the first cylindrical portion, first cylindrical portion
Outer peripheral face abuts with the inner peripheral surface of the tool body front in the reference for installation hole, between the external thread part and the head
The head side is formed with the second cylindrical portion, the outer peripheral face of second cylindrical portion and the work in the through hole of the vane body
The inner peripheral surface for having body rear side abuts, and is less than between first cylindrical portion and second cylindrical portion formed with external diameter and is somebody's turn to do
First flexible portion of the external diameter of the first cylindrical portion and second cylindrical portion.
2. indexable insert blade type cutting element according to claim 1, it is characterised in that
Be less than the external diameter of second cylindrical portion formed with external diameter between second cylindrical portion and the head second can
Scratch portion.
3. indexable insert blade type cutting element according to claim 1 or 2, it is characterised in that
In the state of the cutting tip is clamped by being screwed into the pinching screw, first cylindrical portion and described first
In the elongated surfaces for one mounting seat wall that border between flexible portion is located at the blade mounting seat, or from the extension
Rise in the reference for installation hole in face.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015186854 | 2015-09-24 | ||
| JP2015-186854 | 2015-09-24 | ||
| PCT/JP2016/076409 WO2017051714A1 (en) | 2015-09-24 | 2016-09-08 | Replaceable tool edge cutting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107614173A true CN107614173A (en) | 2018-01-19 |
| CN107614173B CN107614173B (en) | 2018-12-14 |
Family
ID=58386461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680030163.1A Active CN107614173B (en) | 2015-09-24 | 2016-09-08 | Indexable insert blade type cutting element |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6164389B1 (en) |
| KR (1) | KR102025532B1 (en) |
| CN (1) | CN107614173B (en) |
| WO (1) | WO2017051714A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111168131A (en) * | 2019-12-13 | 2020-05-19 | 华东理工大学 | Cutter for removing burrs of crossed holes |
| CN113245604A (en) * | 2021-05-07 | 2021-08-13 | 赣州澳克泰工具技术有限公司 | Milling cutter and cutter bar thereof |
| CN114074190A (en) * | 2020-08-21 | 2022-02-22 | 株式会社泰珂洛 | Cutting tool |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111761111B (en) * | 2019-04-01 | 2023-03-21 | 京瓷株式会社 | End mill |
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- 2016-09-08 WO PCT/JP2016/076409 patent/WO2017051714A1/en active Application Filing
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| GB1040067A (en) * | 1964-03-30 | 1966-08-24 | De Vlieg Machine Co | Improvements in or relating to cutting tools |
| US4398853A (en) * | 1980-11-10 | 1983-08-16 | Kennametal Inc. | Insert holder and method of holding |
| US5199828A (en) * | 1990-11-21 | 1993-04-06 | Seco Tools Ab | Cutting tool with insert and removable locking pin |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111168131A (en) * | 2019-12-13 | 2020-05-19 | 华东理工大学 | Cutter for removing burrs of crossed holes |
| CN111168131B (en) * | 2019-12-13 | 2021-08-03 | 华东理工大学 | Cutter for removing burrs of crossed holes |
| CN114074190A (en) * | 2020-08-21 | 2022-02-22 | 株式会社泰珂洛 | Cutting tool |
| CN114074190B (en) * | 2020-08-21 | 2024-02-23 | 株式会社泰珂洛 | Cutting tool |
| CN113245604A (en) * | 2021-05-07 | 2021-08-13 | 赣州澳克泰工具技术有限公司 | Milling cutter and cutter bar thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107614173B (en) | 2018-12-14 |
| JPWO2017051714A1 (en) | 2017-09-21 |
| KR102025532B1 (en) | 2019-09-26 |
| JP6164389B1 (en) | 2017-07-19 |
| WO2017051714A1 (en) | 2017-03-30 |
| KR20180008750A (en) | 2018-01-24 |
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