CN107614173B - Indexable insert blade type cutting element - Google Patents
Indexable insert blade type cutting element Download PDFInfo
- Publication number
- CN107614173B CN107614173B CN201680030163.1A CN201680030163A CN107614173B CN 107614173 B CN107614173 B CN 107614173B CN 201680030163 A CN201680030163 A CN 201680030163A CN 107614173 B CN107614173 B CN 107614173B
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- China
- Prior art keywords
- mounting base
- cylinder portion
- hole
- pinching screw
- head
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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
Abstract
In the indexable insert blade type cutting element, cutting tip is detachably mounted in blade mounting base and being seated in blade mounting base and being clamped by pinching screw, external thread part is formed in the one end of pinching screw, the head with conical surface-shaped outer peripheral surface is formed in the other end, external thread part side between external thread part and head is formed with the first cylinder portion, and the above-mentioned head side between external thread part and head is formed with the second cylinder portion, and the first flexible portion is formed between the first cylinder portion and the second cylinder portion.
Description
Technical field
The present invention relates to a kind of indexable insert blade type cutting elements, wherein cutting tip is by being seated at the tool of being formed in
It is clamped in the blade mounting base of the slit-shaped of the front end of main body and by pinching screw, so that the cutting tip is detachably
It is installed in the blade mounting base, wherein the cutting tip has the vane body for being formed with cutting edge.
The application was claimed priority based on the 2015-186854 patent application in Japanese publication in September 24th in 2015, and
And here cite its content.
Background technique
As this indexable insert blade type cutting element, such as propose following cutting element in patent document 1: one
Kind indexable insert blade type cutting element, the blade installation of the hollow portion in the front end for being set to tool body with slit-shaped
Cutting tip is clamped on seat, and the cutting tip is fixed by secure component, wherein in the blade mounting base side of tool body
The part corresponding with the head circular conical surface of secure component in portion is provided with the center line relative to secure component and to tool body
The conical bearing surface of extreme direction bias afterwards, another blade mounting base 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 with the side wall and corresponding with the external thread part of secure component, by by blade
Pressing that mounting base side surface part carries out and the pin hole side slave cutting tip carried out by the cylindrical portion of secure component are to tool 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 as datum clamp face.
Here, in the indexable insert blade type cutting element documented by the patent document 1, such as above by tool body
The part corresponding with secure component head circular conical surface of blade mounting base side surface part center line relative to secure component is set
And to the conical bearing surface of extreme direction bias 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, thus using the cylindrical portion of secure component to tool body rear end side
Press the pin hole side of cutting tip.
Also, due to and abutting the side wall of cylindrical portion supported hole with the cylindrical portion of secure component as reference for installation
Face, therefore can be by between cylindrical portion lower end when being so bent secure component and cylindrical portion supported hole front end side side wall
It presses to stablize the pressing force of the cutting tip generated by cylindrical portion, additionally it is possible to various directions for tool use process and big
Small load keeps high-precision cutting tip installation accuracy.
Patent document 1: No. 3971522 bulletins of Japanese Patent No.
But the secure component of the indexable insert blade type cutting element documented by the patent document 1 has a problem in that
Due to being formed with the cylindrical portion in the whole length between external thread part and head, the rigidity of secure component is higher, difficult
To be bent secure component.In addition, due to being formed with cylindrical portion, cylinder in the whole length between external thread part and head
Contact area between portion and the pin hole side of cutting tip is also larger, and in cylindrical portion to tool body rear end side pushpin
The frictional resistance when side of hole is also larger, to it is also possible to lead to the offset movement of cutting tip when tightening secure component.
Summary of the invention
The present invention proposes in this background, its purpose is to provide a kind of indexable insert blade type cutting element,
As described above be able to achieve cutting tip pressing force 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.
To solve the above-mentioned problems and realize this purpose, in indexable insert blade type cutting element of the invention, cutting
Blade passes through in the blade mounting base for the slit-shaped for being seated at the front end for being formed in tool body and is clamped by pinching screw, from
And the cutting tip is detachably installed in the blade mounting base, wherein the cutting tip, which has, is formed with cutting
The vane body of sword, the indexable insert blade type cutting element is characterized in that, is formed with: being taken a seat in the vane body
Face can be abutted with the mounting base bottom surface of the blade mounting base；And through hole, the vane body is penetrated through for the clamping spiral shell
Nail insert is formed on a mounting base wall surface in two mounting base wall surfaces relative to each other of the blade mounting base
Reference for installation hole and threaded hole, and it is formed with coniform supporting surface in the tool body front end side of another mounting base wall surface,
The coniform supporting surface there is the center line relative to the threaded hole and to the center line of tool body rear end eccentricity,
The one end of the pinching screw is formed with the external thread part being screwed into the threaded hole, is formed with head in the other end, institute
State head have can with the conical surface-shaped outer peripheral surface of the coniform supporting surface sliding contact, in the external thread part and the head
Between the external thread part side be formed with the first cylinder portion, the outer peripheral surface in the first cylinder portion and the reference for installation hole
The inner peripheral surface of tool body front end side abuts, and the head side between the external thread part and the head is formed with second
The inner peripheral surface of tool body rear end side in cylindrical portion, the outer peripheral surface in the second cylinder portion and the through hole of the vane body
It abuts, outer diameter is formed between the first cylinder portion and the second cylinder portion less than the first cylinder portion and the second cylinder portion
Outer diameter the first flexible portion.
In the indexable insert blade type cutting element so constructed, when installing cutting tip and being screwed into pinching screw
When, the outer peripheral surface in the first cylinder portion in the external thread part side of pinching screw and the tool body front end side in the reference for installation hole
Inner peripheral surface sliding contact, therefore these inner and outer circumferential surfaces are as in indexable insert blade type cutting element documented by patent document 1
Datum clamp face play a role.Therefore, same as indexable insert blade type cutting element documented by patent document 1, it can
Stablize the pressing force of cutting tip, additionally it is possible to which the load in various directions and size when for machining remains high-precision and cuts
Paring blade installation accuracy, and obtain higher machining accuracy.In addition, the periphery in the second cylinder 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 base bottom surface of blade mounting base.
Also, in the indexable insert blade type cutting element of above structure, further in this first cylinder portion and second
It is formed with first flexible portion of the outer diameter less than the outer diameter in the first cylinder portion and the second cylinder portion between cylindrical portion, passes through to be formed
This first flexible portion can reduce the rigidity of pinching screw in necessary range, therefore clamp and fix cutting tip
When pinching screw can be made to be readily bent.It is thus possible to which enough be screwed into power and conscientiously and be stably installed cutting tip with less
In blade mounting base.
In addition, the outer diameter due to first flexible portion is less than the outer diameter in the first cylinder portion and the second cylinder portion, this
One flexible portion will not be contacted with the through hole of vane body, can reduce the contact area between pinching screw and through hole.And
And since frictional resistance when pinching screw presses through hole to tool body rear end side can also be reduced with this, can prevent
The only situation as the vane body offset movement when tightening pinching screw.Therefore be able to achieve cutting tip installation accuracy into
One step high precision int, can further increase machining accuracy.
Furthermore it is preferred that also forming outer diameter between the second cylinder portion and the head less than the second cylinder portion
Second flexible portion of outer diameter.Thereby, it is possible to be more flexurally compliant pinching screw, and pinching screw can also be further decreased and passed through
Contact area between through-hole.
Furthermore it is preferred that in the state of clamping the cutting tip and being screwed into the pinching screw, first circle
Boundary between canister portion and first flexible portion is located at the elongated surfaces of one mounting base wall surface of the blade mounting base
On, or from the elongated surfaces in the reference for installation hole.As a result, since the first cylinder portion will not be with vane body
Through hole contact, therefore folder is screwed into the lesser situation in gap for example between the first cylinder portion and the through hole of vane body
When tight screw, the peace of vane body can be prevented by the contact between the first cylinder portion and the through hole of vane body
Fill runout accuracy error.
As described above, in accordance with the invention it is possible to keep the pressing force of the cutting tip generated by pinching screw steady
Surely while change, additionally it is possible to by cutting tip conscientiously and be accurately mounted in blade mounting base, to be able to achieve more high-precision
The machining of degree.
Detailed description of the invention
Fig. 1 is the side view for indicating the front end of indexable insert blade type cutting element of one embodiment of the present invention.
Fig. 2 is the ZZ cross-sectional view in Fig. 1.
Specific embodiment
Fig. 1 and Fig. 2 is the figure for indicating 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, which is seated at, is formed in centered on axes O
The blade mounting base 2 of the slit-shaped of the front end (left part in Fig. 1 and Fig. 2) of the generally cylindrical tool body 1 of shape
Above and by the clamping of pinching screw 4 (cutting tip 3 is clamped in blade mounting base 2 by fastening pinching screw 4), thus institute
It states cutting tip 3 to be detachably mounted in blade mounting base 2, is formed with arc-shaped wherein the cutting tip 3 has and cuts
Cut the vane body 3b of sword 3a.In this indexable insert blade type cutting element, the knife handle (not shown) of 1 rear end side of tool body
Portion is held on the main shaft of lathe, thus while the indexable insert blade type cutting element is rotated around axes O usually to axis
The direction that line O intersects is sent out, and carries out machining to workpiece such as metal molds by above-mentioned cutting edge 3a.In addition, in this reality
Apply in mode, by it is in the extending direction of axes O, from the shank section of tool body 1 towards the direction of blade mounting base 2 be known as before
Direction from blade mounting base 2 towards shank section is known as rear end side (in Fig. 1 and Fig. 2 by end side (left side in Fig. 1 and Fig. 2)
Right side).In addition, the direction orthogonal with axes O is known as radial.The direction of close axes O in radial direction is known as diameter inwardly side,
The direction that will be far from axes O is known as diameter outward.
It, mainly can with have pinching screw 4 of thread size in the range of M2 to M8 in addition, in the present embodiment
Transposition blade formula cutting element is object, but is cut below to the indexable insert blade type for having the pinching screw 4 that thread size is M8
The tool of cutting is illustrated.In addition, the thread size of the pinching screw 4 of indexable insert blade type cutting element of the invention does not limit
In above range.
The vane body 3b of cutting tip 3 is formed as plate by hard materials such as hard alloy, and has 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)
Cutting edge 3a to front end periphery (front end side and diameter are outward) prominent and cutting edge 3a of tool body 1 around axes O revolve
Rotational trajectory made of turning is that the hemispherical mode in the axes O with center is mounted in blade mounting base 2.Change speech
It, vane body 3b is mounted in blade mounting base 2 in such a way that the center of the cutting edge 3a circular arc for being in is by axes O.Separately
Outside, the through hole 3e of circular section is formed on vane body 3b, the through hole 3e, which has, passes through above-mentioned cutting edge 3a institute
The center line and perforation vane body 3b of the approximate centre for the circular arc for being in, and in above-mentioned two side 3c upper opening.
On the other hand, hardness by hardness lower than vane body 3b of tool body 1 and pinching screw 4 and being capable of flexible deformation
The metal materials such as steel formed.Wherein, the front end of tool body 1 is formed the case where being equipped with cutting tip 3
Under it is hemispherical centered on intersection point between axes O and the above-mentioned center line of the through hole 3e of vane body 3b.But the work
The radius for the hemisphere that the above-mentioned rotational trajectory of the radius ratio cutting edge 3a for the hemisphere that the front end of tool main body 1 is in is in is slightly smaller.
As shown in Fig. 2, from the direction orthogonal with the above-mentioned center line of through hole 3e of axes O and vane body 3b
When, the insert mounting base 2 for being formed in the front end of this tool body 1 is formed the front end side in tool body 1 with U
The slit-shaped of font opening, i.e. the blade mounting base 2 has: two opposite mounting base wall surface 2a, 2b, it is parallel to each other and also with
Axes O is parallel；With the mounting base bottom surface 2c towards the front end side of tool body 1, the mounting base bottom surface 2c and these mounting bases
Wall surface 2a, 2b are vertical and orthogonal with axes O.
Two mounting base wall surfaces 2a, 2b are located at the distance being equal to each other away from axes O, these mounting base wall surfaces 2a, 2b it
Between be set as can be so that above-mentioned two side 3c of vane body 3b be slided respectively with two mounting base wall surfaces 2a, 2b at interval
The mode of contact is embedded in the size of vane body 3b.So by being embedded in vane body 3b and making above-mentioned face 3d and the mounting base of taking a seat
Bottom surface 2c is abutted, so that cutting tip 3 is landed in blade mounting base 2 in the center line of the through hole 3e mode orthogonal with axes O
On.
In addition, in first mounting base wall surface (Fig. 2 as a mounting base wall surface in two mounting base wall surfaces 2a, 2b
In downside mounting base wall surface) on 2a, be formed as follows reference for installation hole 5 and threaded hole 6: i.e. as described above
In the state of being landed in cutting tip 3 in blade mounting base 2, the reference for installation hole 5 and the threaded hole 6 are faced and the first installation
The opening portion of above-mentioned through hole 3e in the side 3c of the vane body 3b of seat wall surface 2a sliding contact.In the present embodiment,
Reference for installation hole 5 is formed in mounting base wall surface 2a upper opening, and on the bottom hole in the reference for installation hole 5 (diameter is outward)
It is formed with threaded hole 6.
Wherein, threaded hole 6 is extended in its center line L1 mode orthogonal with axes O.In addition, reference for installation hole 5 is in along axis
The long hole shape (run-track shaped) that the direction line O extends, i.e. reference for installation hole 5 is formed on the section parallel with mounting base wall surface 2a
For a circle is passed through the side of the width equal with the diameter between its diametrically two semicircles after the segmentation of axes O direction
Shape (square) is come the shape that is formed by connecting.Center in these semicircles positioned at the semicircle of the front end side of tool body 1 is located at
On the center line L1 of threaded hole 6, the inner peripheral surface along the semicircular cylinder planar in the reference for installation hole 5 of the semicircle of the front end side is tool master
The datum clamp face 5a of 1 side of body.In addition, internal diameter (screw thread of the internal diameter (said one diameter of a circle) of these semicircles than threaded hole 6
The diameter at the screw thread bottom (ネ ジ paddy) in hole 6) it is slightly larger.
On the other hand, in the second mounting base as another mounting base wall surface in two mounting base wall surfaces 2a, 2b
It is formed with recessed coniform hole 7 on wall surface (the mounting base wall surface of the upside in Fig. 2) 2b, thus on the outer peripheral surface of tool body 1
Opening.Wherein, the recessed coniform hole 7 is far from the second mounting base wall surface 2b and with towards the front end periphery of tool body 1
Side (upside in Fig. 2, diameter is outward) and internal diameter becomes larger.The coniform hole 7 is in the tool parallel with mounting base wall surface 2b
Be formed round on the section of main body 1, the internal diameter of the circle with towards the peripheral side of tool body 1 (diameter is outward) and by
Gradual change is big.
In addition, the semicircle conical surface of the semicircle of the front end side 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 the center line with threaded hole 6
L1 compares the rear end eccentricity slightly towards tool body 1.In addition, center line L2 is parallel with center line L1.In addition, in the recessed circular cone
Between the bottom hole (the inside square end of diameter in recessed coniform hole 7) in shape hole 7 and the second mounting base wall surface 2b, with recessed coniform 7 phase of hole
Mode even is formed with long hole portion 7b of the internal diameter greater than the internal diameter in reference for installation hole 5.Long hole portion 7b is formed a circle is (straight
Diameter is greater than the circle of half circular diameter in reference for installation hole 5) pass through between its diametrically two semicircles after the segmentation of axes O direction
The rectangular shape to be formed by connecting of the width equal with the diameter.Also, the center of above-mentioned two semicircle of long hole portion 7b
Midpoint is located on the center line L1 of threaded hole 6.Long hole portion 7b is as follows in the second mounting base wall surface 2b upper opening: i.e. the length
Hole portion 7b is in face of the opening portion with the through hole 3e in the side 3c of the vane body 3b of the second mounting base wall surface 2b sliding contact.
Pinching screw 4 is formed with the external thread part being screwed into above-mentioned threaded hole 6 in one end (lower portion in Fig. 2)
4a, and it is formed with head 4b in the other end (upper portion in Fig. 2), external thread part 4a is being screwed into spiral shell by head 4b
When pit 6 can with above-mentioned coniform supporting surface 7a sliding contact and have with towards the other end side and gradually expanding circle
The outer peripheral surface of conical surface shape.In addition, being formed with connecting hole 4c on the end face of head 4b, connecting hole 4c is being screwed into or is unclamping clamping
Engage when screw 4 with behaviour's action tools such as spanners.
In addition, being formed between these external thread parts 4a and head 4b in the one end side for being provided with external thread part 4a
The first cylinder portion 4d.The first cylinder portion 4d is in cylinder planar of its outer peripheral surface centered on the center line of pinching screw 4, this
The outer diameter of one cylindrical portion 4d is set to, and conduct above-mentioned installation than reference for installation hole 5 more slightly larger than the outer diameter of external thread part 4a
The internal diameter of the inner peripheral surface of the front end side of datum level 5a is small and difference is extremely subtle.External thread part 4a is being screwed into as described above
When threaded hole 6, the outer peripheral surface of the first cylinder portion 4d can be with datum clamp face 5a sliding contact.In the present embodiment,
The interconnecting piece comprising incomplete thread portion is provided between one cylindrical portion 4d and external thread part 4a.It is preferred that the outer diameter of interconnecting piece is less than
The bottom diameter (Gu Jing) of external thread part 4a, and the interconnecting piece has outside than aftermentioned first flexible portion 4f and the second flexible portion 4g
The small outer diameter of diameter.
On the other hand, it is being provided with (between the first cylinder portion 4d and head 4b) between external thread part 4a and head 4b
The centerline direction of the other end lateral edge pinching screw 4 of head 4b and the first cylinder portion 4d interval and be formed with the second circle
Canister portion 4e.The outer peripheral surface of the second cylinder portion 4e is also in the cylinder planar centered on the center line of pinching screw 4, second circle
The outer diameter of canister portion 4e is set to equal with the outer diameter of the first cylinder portion 4d.In addition, in the present embodiment, the second cylinder portion 4e
Length on the centerline direction of pinching screw 4 is set to longer than the first cylinder portion 4d.In addition, the first cylinder 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 above-mentioned length of the first cylinder portion 4d is preferably the
The 10~50% of the length of two cylindrical portion 4e, more preferably 20~40%, but not limited to this.
Also, be formed between these the first cylinder portion 4d and the second cylinder portion 4e outer diameter less than the first cylinder portion 4d and
First flexible portion 4f of the outer diameter of the second cylinder portion 4e.In addition, in the present embodiment, in the second cylinder portion 4e and pinching screw
The second flexible portion 4g of outer diameter of the outer diameter less than the second cylinder portion 4e is formed between 4 head 4b.These first flexible portions 4f
And second flexible portion 4g be also in cylinder planar of its outer peripheral surface centered on the center line of pinching screw 4.In the present embodiment,
The outer diameter (diameter) of the first flexible portion 4f and second flexible portion 4g are equal to each other, the first flexible portion 4f and the second flexible portion 4g
Outer diameter (diameter) difference between the first cylinder portion 4d and the second cylinder 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 make pinching screw 4 external thread part 4a and threaded hole 6 screw togather) and
In the state that cutting tip 3 is clamped in blade mounting base 2, as shown in Fig. 2, the first cylinder portion 4d and the first flexible portion 4f it
Between boundary be located in the elongated surfaces of the first mounting base wall surface 2a of the blade mounting base 2, or positioned at upper from the elongated surfaces
It states in reference for installation hole 5.In addition, in the present embodiment, equally cutting tip 3 is being clamped and being screwed into pinching screw 4
In the state of in blade mounting base 2, center of the second cylinder portion 4e on the centerline direction of pinching screw 4 is set to greatly
It causes in the above-mentioned axes O of center, that is, tool body 1 of the thickness direction of vane body 3b.As above-mentioned, in present embodiment
Pinching screw 4 external thread part 4a and head 4b between, interconnecting piece, the first cylinder 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 the side external thread part 4a on the central axis direction of pinching screw 4.
In addition, setting the position of the center line of through hole 3e as follows for the through hole 3e of vane body 3b
It sets and internal diameter: so that vane body 3b is landed in knife by making to take a seat and face 3d is abutted with mounting base bottom surface 2c as described above
In the state of in piece mounting base 2, when starting external thread part 4a to be screwed into threaded hole 6, in the first cylinder portion 4d and the second cylinder
The outer peripheral surface of portion 4e is spaced apart very small interval with the inner peripheral surface of the 1 rear end side section of tool body of through hole 3e.At this
In embodiment, the internal diameter of through hole 3e 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 the center line of the through hole 3e of vane body 3b
Cutting tip 3 is embedded in blade mounting base 2 by the mode orthogonal with axes O, and the face 3d that makes to take a seat is abutted with mounting base bottom surface 2c
And the cutting tip 3 is made to take a seat, later 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 threaded hole 6 and assembles the cutting tip 3.
Although being clamped in the center line and threaded hole 6 of screw thread 4 when starting external thread part 4a to be screwed into threaded hole 6
Heart line L1 is coaxial, but when the coniform supporting surface 7a sliding contact of the outer peripheral surface of the head 4b of pinching screw 4 and recessed coniform hole 7
When, due to the coniform supporting surface 7a center line L2 compared with the center line L1 of threaded hole 6 slightly towards the rear end of tool body 1
Eccentricity, therefore pinching screw 4 starts to be bent in such a way that head 4b topples over to the rear end side of tool body 1.
Also, pinching screw 4 is bent if so, then the other end side (the head side 4b) in its second cylinder portion 4e is outer
Circumferential surface is abutted with the inner peripheral surface of 1 rear end side of tool body of the through hole 3e of cutting tip 3, and vane body 3b is pressed into
The mounting base bottom surface 2c of blade mounting base 2.In addition, at the same time, since the head 4b of pinching screw 4 is pushed to coniform branch
Support face 7a, narrower intervals between two mounting base wall surfaces 2a, 2b of blade mounting base 2 and two sides for pressing vane body 3b
Face 3c is pressed by these, cutting tip 3 is clamped and is fixed in blade mounting base 2.
Here, due to when pinching screw 4 starts bending, the outer peripheral surface of the first cylinder portion 4d and the work in reference for installation hole 5
Has the datum clamp face 5a sliding contact of 1 front end side of main body, therefore pinching screw 4 continues to be bent as follows: that is, head 4b
Side is with the part of datum clamp face 5a sliding contact to be fulcrum to tool body 1 in the outer peripheral surface of the first cylinder portion 4d
Rear end side inclination.That is, since the part of the first cylinder portion 4d and datum clamp face 5a sliding contact is as 4 side of pinching screw
Datum clamp face play a role, and pass through the datum clamp face 5a of tool body 1 side, in the front end side of tool body 1
And peripheral side (diameter is outward) constrains pinching screw 4, therefore no matter cutting edge 3a is in any direction to cutting in the cutting process
Blade 3 applies load, and also cutting tip 3 can be firmly held in blade mounting base 2.
In addition, in the indexable insert blade type cutting element of above structure, the pinching screw 4 the first cylinder portion 4d with
It is first flexible less than the outer diameter of these the first cylinder portion 4d and the second cylinder portion 4e that outer diameter is formed between the second cylinder portion 4e
Portion 4f.Therefore, the rigidity of first flexible portion 4f can be set as in necessary range being less than the first cylinder portion 4d and second
The rigidity of cylindrical portion 4e, so pinching screw 4 can be made to be readily bent.The first flexible portion 4f of this effect can sufficiently 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 above-mentioned length of the first flexible portion 4f is preferably the first cylinder
The 100~500% of the length of portion 4d, more preferably 200~400%, but not limited to this.
Moreover, because the first flexible portion 4f and as described above the first cylinder as the bending fulcrum of pinching screw 4
Portion 4d is adjacent, and pinching screw 4 can be made to be more flexurally compliant.It therefore, can 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 threaded hole 6 by pinching screw 4, and can
Pinching screw 4 is set effectively to be bent and cutting tip 3 is firmly secured in blade mounting base 2.
In addition, the outer diameter due to first flexible portion 4f is less than the second cylinder abutted with the through hole 3e of vane body 3b
The outer diameter of portion 4e, therefore first flexible portion 4f will not be contacted with through hole 3e, thus between pinching screw 4 and through hole 3e
Contact area is smaller.Thus, it is also possible to which pinching screw 4 is abutted with through hole 3e and to the rear end side of tool body 1 by push type broach
Frictional resistance control between pinching screw 4 and through hole 3e when piece main body 3b is smaller, therefore can be prevented will be complete
The offset movement of vane body 3b when tightening of pinching screw 4 before fixed cutting tip 3, and can be with higher precision
Cutting tip 3 is mounted in blade mounting base 2 and improves machining accuracy.
In addition, in the present embodiment, being also formed with outer diameter between the second cylinder portion 4e and head 4b of pinching screw 4
Second flexible portion 4g of the outer diameter less than the second cylinder portion 4e.Therefore, pinching screw 4 can be made by second flexible portion 4g
It is more flexurally compliant, and the contact area between the pinching screw 4 and the through hole 3e of vane body 3b can be further decreased
And further decrease frictional resistance.
Moreover, by so the second cylinder portion 4e and head 4b of the another side of pinching screw 4 (the head side 4b) it
Between form the second flexible portion 4g that will not contact with through hole 3e, thus the entire part between external thread part 4a and head 4b
For the second cylinder portion 4e due to the bending of pinching screw 4 compared with the case where the cylindrical portion that through hole 3e is contacted, can be made
What outer peripheral surface was contacted with through hole 3e is located proximate to the one end of the first cylinder portion 4d of the datum clamp face as pinching screw 4
Side (side external thread part 4a) outer peripheral surface.Therefore, even if the amount of bow of pinching screw 4 is identical, can also reinforce with the one end side
Outer peripheral surface is point action in the pressing force on the position that the second cylinder portion 4e is contacted with through hole 3e, and can be by bite
Piece 3 is fixed on strongerly in blade mounting base 2.
In addition, in the present embodiment, cutting tip 3 is being clamped in blade mounting base 2 and being screwed into pinching screw 4
In the state of upper, center of the second cylinder portion 4e on the centerline direction of pinching screw 4 is set to be located substantially at blade master
The center of the thickness direction of body 3b.It therefore, can be on the thickness direction (left and right directions in Fig. 2) of insert main body 3b
Weighing apparatus ground pressing cutting tip 3, so that the cutting tip 3 is more stably mounted in blade mounting base 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 above-mentioned length of the second cylinder portion 4e is excellent
The 30~70% of the thickness (the distance between two side 3c) of vane body 3b, more preferably 40~60% are selected as, but not
It is defined in this.
But such as it is natively small in the outer diameter of such as pinching screw 4 and can only by the first flexible portion 4f make clamp spiral shell
The sufficiently bending of nail 4 or in the case where reducing contact area between pinching screw 4 and through hole 3e, can not also be formed this second
Flexible portion 4g, but be connected and extending the second cylinder portion 4e directly to another side with head 4b.In addition, in contrast
Ground can also be formed between the external thread part 4a and head 4b of pinching screw 4 there are three above flexible portion.
On the other hand, in the present embodiment, cutting tip 3 is being clamped in blade peace and being screwed into pinching screw 4
In the state of filling on seat 2, the boundary between the first cylinder portion 4d and the first flexible portion 4f is located at the first installation of blade mounting base 3
In the elongated surfaces of seat wall surface 2a, or from the elongated surfaces in reference for installation hole 5.Therefore, the first cylinder portion 4d will not be with
Through hole 3e contact.
Also, due to ensuring gap between through hole 3e and the first flexible portion 4f when continuing to be screwed into pinching screw 4,
Therefore it is avoided that the part towards 1 front end side of tool body in the outer peripheral surface of the first flexible portion 4f is contacted with through hole 3e.Cause
This can prevent from generating installation runout precision because vane body 3b rotates centered on through hole 3e by being avoided the contact
Deviation.
The center by recessed coniform hole 7 of said effect can be sufficiently obtained and being bent pinching screw 4 suitably
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, which is preferably 10~40 °, and more preferably 15~35 °.In addition, passing through
Pinching screw 4 is screwed into the state that cutting tip 3 is clamped in blade mounting base 2, coniform supporting surface 7a and clamps spiral shell
The preferred model of the length on the direction center line L2 in recessed coniform hole 7 in the region that the outer peripheral surface of the head 4b of nail 4 is contacted
It encloses also different according to the thread size of pinching screw 4.For example, in the thread size of pinching screw 4 as in the present embodiment
In the case where M8, which is preferably the 5~45% of the length of pinching screw 4, more preferably 15~35%.
In addition, in embodiments, hemispherical indexable of rotational trajectory about the cutting edge 3a to cutting tip 3
Blade type ball end mill is illustrated using situation of the invention, but can also be to being both indexable insert blade type slotting cutter
Such as following square toes slotting cutter or radius end mill be with the application of the invention, wherein, the square toes slotting cutter be cutting edge by along with
The shear blade and be connected with the outer circumference end (diameter is held outward) of the shear blade and rotated around axes O that axes O generally perpendicular direction extends
Rotational trajectory in cylinder planar centered on axes O peripheral edge construction slotting cutter, which is at this
The slotting cutter of the basil of arc-shaped is formed on the corner that a little peripheral edges are intersected with shear blade.Further, it is also possible to other than to slotting cutter
Cutting element with the application of the invention, for example can also to indexable insert blade type drill bit application the present invention.
Embodiment
Then, it enumerates embodiment to be illustrated the effect as brought by flowering structure: i.e. and being screwed into pinching screw 4
Side in the state that cutting tip 3 is clamped in blade mounting base 2, between above-mentioned the first cylinder portion 4d and the first flexible portion 4f
Boundary is located in the elongated surfaces of the first mounting base wall surface 2a of blade mounting base 2, or positioned at reference for installation hole 5 from the elongated surfaces
It is interior.In the present embodiment, pinching screw 4 of the production based on above embodiment, measurement will be cut by the pinching screw 4
The position precision of the cutting edge 3a of vane body 3b when blade 3 is initially installed to the blade mounting base 2 of tool body 1 using as
The operation for installing cutting tip 3 again later by unclamping 4 dismounting of cutting blade 3 of pinching screw is then set as 1 by a reference value
A period, the 10th period of measurement, the 100th period, cutting tip 3 under the 200th period installation runout precision, and and benchmark
Value is compared.
Here, external thread part 4a is the second level screw thread of M8 × 0.75mm for pinching screw 4 in this present embodiment,
The diameter of the first cylinder portion 4d and the second cylinder portion 4e are that the diameter of 8mm, the first flexible portion 4f and the second flexible portion 4g are
7.7mm, the maximum gauge of head 4b is 12mm and minimum diameter is 7.7mm.Center line of the first cylinder portion 4d in pinching screw 4
Length on direction is 1mm, and the length of the first flexible portion 4f is 3.08mm, and the length in the second cylinder portion is 3.6mm, and second is flexible
The length of portion 4g is 1.6mm, and the length of head 4b is 7.9mm.The coniform outer peripheral surface of head 4b is relative to pinching screw 4
The tilt angle of centerline direction is 20 °.In addition, for cutting tip 3, between two side 3c of vane body 3b
With a thickness of 7.2mm, the radius of the cutting edge 3a of arc-shaped is 15mm, and the diameter of through hole 3e is calculated as 8.008mm with measured value.Work
Have main body 1 datum clamp face 5a have it is above-mentioned run-track shaped, form the half run-track shaped diameter of a circle in terms of measured value
For 8.008mm.Also, in the state that cutting tip 3 is clamped in blade mounting base 2 and being screwed into pinching screw 4, folder
Tightly first mounting base wall surface 2a of the boundary between the first cylinder portion 4d and the first flexible portion 4f of screw 4 from blade mounting base 2
Elongated surfaces rise slightly in reference for installation hole 5.
In addition, the installation runout precision as cutting tip 3, when with installation cutting tip 3 initial using pinching screw 4
Cutting edge 3a by the center of the cutting edge 3a of the arc-shaped in Fig. 1 and on the straight line vertical with the axes O of tool body 1
Both ends interval on the basis of be worth, measurement the 10th period, the 100th period, the above-mentioned interval under the 200th period and a reference value difference.
In addition, using indexable insert blade type cutting element as described in Patent Document 1 as comparative example corresponding with above-described embodiment
The such external thread part of secure component and head between entire part be diameter 8mm single cylindrical portion pinching screw, come
Repeat to dismantle the period as the cutting tip 3 after clamping cutting tip 3 same as described above, the 10th period of measurement,
Above-mentioned interval under 100th period, the 200th period, and by above-mentioned interval and as between above-mentioned under the 1st period of a reference value
The installation runout precision of cutting tip 3 is set as every its difference.
As a result, in a comparative example, the difference at above-mentioned interval and a reference value under the 10th period is 1 μm, under the 100th period
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 period is 11 μm, is confirmed because anti-
Again carry out cutting tip 3 installation and disassembling section and generate installation runout accuracy error.On the other hand, in embodiment,
The difference at above-mentioned interval and a reference value under the 10th period is 0 μm, deviation is confirmed, even if in the 100th period and the 200th period
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 availability
Indexable insert blade type cutting element according to the present invention can make the pressing force of cutting tip stabilized while make
Pinching screw is readily bent, and can prevent the cutting tip offset movement when tightening.
Description of symbols
1 tool body
2 blade mounting bases
2a, 2b mounting base wall surface
2c mounting base bottom surface
3 cutting tips
3a cutting edge
3b vane body
The side 3c
3d takes a seat face
3e through hole
4 pinching screws
4a external thread part
The head 4b
4c connecting hole
4d the first cylinder portion
4e the second cylinder portion
The first flexible portion of 4f
The second flexible portion of 4g
5 reference for installation holes
5a datum clamp face
6 threaded holes
7 recessed coniform holes
The coniform supporting surface of 7a
7b long hole portion
The axis of O tool body 1
The center line of L1 threaded hole 6
The center line of the coniform supporting surface 7a of L2
Claims (3)
1. a kind of indexable insert blade type cutting element, cutting tip passes through the slit for being seated at the front end for being formed in tool body
It is clamped in the blade mounting base of shape and by pinching screw, so that the cutting tip is detachably installed on the blade installation
On seat, wherein the cutting tip has the vane body for being formed with cutting edge, the spy of the indexable insert blade type cutting element
Sign is,
Be formed in the vane body: face of taking a seat can be abutted with the mounting base bottom surface of the blade mounting base；And perforation
Hole, penetrates through the vane body so that the pinching screw is inserted,
In two mounting base wall surfaces relative to each other of the blade mounting base, installation is formed on a mounting base wall surface
Datum hole and threaded hole, and it is formed with coniform supporting surface in the tool body front end side of another mounting base wall surface, it is described
Coniform supporting surface there is the center line relative to the threaded hole and to the center line of tool body rear end eccentricity,
It is formed with the external thread part being screwed into the threaded hole in the one end of the pinching screw, is formed with head in the other end
Portion, the head have can with the conical surface-shaped outer peripheral surface of the coniform supporting surface sliding contact,
The external thread part side between the external thread part and the head is formed with the first cylinder portion, the first cylinder portion
Outer peripheral surface is abutted with the inner peripheral surface of the tool body front end side in the reference for installation hole, between the external thread part and the head
The head side is formed with the second cylinder portion, the work in the outer peripheral surface in the second cylinder portion and the through hole of the vane body
The inner peripheral surface for having body rear side abuts, and is formed with outer diameter between the first cylinder portion and the second cylinder portion and is less than this
First flexible portion of the outer diameter in the first cylinder portion and the second cylinder portion.
2. indexable insert blade type cutting element according to claim 1, which is characterized in that
Be formed between the second cylinder portion and the head outer diameter less than the second cylinder portion outer diameter second can
Scratch portion.
3. indexable insert blade type cutting element according to claim 1 or 2, which is characterized in that
In the state of clamping the cutting tip and being screwed into the pinching screw, the first cylinder portion and described first
In the elongated surfaces for one mounting base wall surface that boundary between flexible portion is located at the blade mounting base, or from the extension
Face, which is risen, to be located in the reference for installation hole.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-186854 | 2015-09-24 | ||
| JP2015186854 | 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 CN107614173A (en) | 2018-01-19 |
| CN107614173B true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111761111B (en) * | 2019-04-01 | 2023-03-21 | 京瓷株式会社 | End mill |
| CN111168131B (en) * | 2019-12-13 | 2021-08-03 | 华东理工大学 | Cutter for removing burrs of crossed holes |
| JP6803014B1 (en) * | 2020-08-21 | 2020-12-23 | 株式会社タンガロイ | Cutting tools |
| CN113245604B (en) * | 2021-05-07 | 2022-10-25 | 赣州澳克泰工具技术有限公司 | Milling cutter and cutter bar thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US5542793A (en) * | 1993-08-03 | 1996-08-06 | Walter Ag | Rotary cutting tool with axially precision positioned end cutting inserts |
| CN1163174A (en) * | 1996-01-31 | 1997-10-29 | 三菱麻铁里亚尔株式会社 | Clamping device for non-sharpening blade |
| JPH11239911A (en) * | 1997-12-26 | 1999-09-07 | Hitachi Tool Eng Ltd | Throwaway cutting tool |
| JP2000512582A (en) * | 1997-04-12 | 2000-09-26 | レーダーマン ゲゼルシャフト ミット ベシュレンクテル ハフツング | Milling tools for machining workpieces made of wood, wood-based materials, plastics or similar materials |
| JP2003145320A (en) * | 2001-11-14 | 2003-05-20 | Mitsubishi Materials Corp | Throwaway tip, and clamp mechanism for the same |
| CN102112260A (en) * | 2008-08-04 | 2011-06-29 | 伊斯卡有限公司 | Cutting tool having bidirectional adjustment mechanism |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2906148A1 (en) * | 1979-02-17 | 1980-08-28 | Walter Gmbh Montanwerke | CUTTING TOOL WITH REPLACEMENT INSERT |
| IL132261A (en) * | 1999-10-07 | 2003-09-17 | Iscar Ltd | Cutting tool assembly and cutting insert therefor |
| JP5060626B2 (en) * | 2011-03-03 | 2012-10-31 | 日立ツール株式会社 | Replaceable blade end mill |
| AT14369U1 (en) * | 2014-11-24 | 2015-09-15 | Ceratizit Austria Gmbh | Tool for machining |
| DE202015009492U1 (en) * | 2015-05-13 | 2018-01-19 | LMT Kieninger GmbH & Co. KG | Fixing screw and cutting tool |
| DE102015107585A1 (en) * | 2015-05-13 | 2016-11-17 | LMT Kieninger GmbH | Cutting plate, method for producing a cutting plate and cutting tool |
-
2016
- 2016-09-08 WO PCT/JP2016/076409 patent/WO2017051714A1/en active Application Filing
- 2016-09-08 JP JP2017506801A patent/JP6164389B1/en active Active
- 2016-09-08 CN CN201680030163.1A patent/CN107614173B/en active Active
- 2016-09-08 KR KR1020177036420A patent/KR102025532B1/en active IP Right Grant
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US5542793A (en) * | 1993-08-03 | 1996-08-06 | Walter Ag | Rotary cutting tool with axially precision positioned end cutting inserts |
| CN1163174A (en) * | 1996-01-31 | 1997-10-29 | 三菱麻铁里亚尔株式会社 | Clamping device for non-sharpening blade |
| JP2000512582A (en) * | 1997-04-12 | 2000-09-26 | レーダーマン ゲゼルシャフト ミット ベシュレンクテル ハフツング | Milling tools for machining workpieces made of wood, wood-based materials, plastics or similar materials |
| JPH11239911A (en) * | 1997-12-26 | 1999-09-07 | Hitachi Tool Eng Ltd | Throwaway cutting tool |
| JP2003145320A (en) * | 2001-11-14 | 2003-05-20 | Mitsubishi Materials Corp | Throwaway tip, and clamp mechanism for the same |
| CN102112260A (en) * | 2008-08-04 | 2011-06-29 | 伊斯卡有限公司 | Cutting tool having bidirectional adjustment mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107614173A (en) | 2018-01-19 |
| JPWO2017051714A1 (en) | 2017-09-21 |
| WO2017051714A1 (en) | 2017-03-30 |
| KR102025532B1 (en) | 2019-09-26 |
| JP6164389B1 (en) | 2017-07-19 |
| KR20180008750A (en) | 2018-01-24 |
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