CN108290234A - Indexable insert blade type cutting element - Google Patents
Indexable insert blade type cutting element Download PDFInfo
- Publication number
- CN108290234A CN108290234A CN201680030152.3A CN201680030152A CN108290234A CN 108290234 A CN108290234 A CN 108290234A CN 201680030152 A CN201680030152 A CN 201680030152A CN 108290234 A CN108290234 A CN 108290234A
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- China
- Prior art keywords
- hole
- mounting base
- wide diameter
- pinching screw
- vane body
- Prior art date
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- Granted
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- 238000005520 cutting process Methods 0.000 title claims abstract description 104
- 230000002093 peripheral effect Effects 0.000 claims description 40
- 238000009434 installation Methods 0.000 claims description 35
- 238000003825 pressing Methods 0.000 claims description 29
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 210000003371 toe Anatomy 0.000 description 2
- 235000010676 Ocimum basilicum Nutrition 0.000 description 1
- 240000007926 Ocimum gratissimum Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- CESKLHVYGRFMFP-UHFFFAOYSA-N sulfonmethane Chemical compound CCS(=O)(=O)C(C)(C)S(=O)(=O)CC CESKLHVYGRFMFP-UHFFFAOYSA-N 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
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
- B23C5/1027—Ball nose end mills with one or more removable cutting inserts
- B23C5/1036—Ball nose end mills with one or more removable cutting inserts having a single cutting insert, the cutting edges of which subtend 180 degrees
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/22—Securing arrangements for bits or teeth or cutting inserts
- B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
- B23C5/2208—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts
- B23C5/2213—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts having a special shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- 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 by being seated in blade mounting base and being clamped by pinching screw, the face of taking a seat that can be abutted with the mounting base bottom surface of blade mounting base is formed in vane body, the through hole of perforation vane body and two sides, the through hole is open on described two sides, in the through hole wide diameter portion is formed with towards at least one of the opening portion of described two sides of vane body opening portion, the internal diameter of the wide diameter portion is more than the internal diameter of the part abutted with the cylindrical portion of pinching screw in the through hole.
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, detachably to the cutting tip
It is installed in the blade mounting base, wherein the cutting tip has the vane body for being formed with cutting edge.
The application is claimed priority based on December 1st, 2015 in the 2015-234767 patent applications of Japanese publication, 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, 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
Mounting base side surface part carry out pressing and by secure component cylindrical portion carry out slave the pin hole side of cutting tip 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 indexable insert blade type cutting element recorded in 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, to using the cylindrical portion of secure component to tool body rear end side
Press the pin hole side of cutting tip.
Also, due to by so that the side wall of cylindrical portion supported hole is abutted with the cylindrical portion of secure component as reference for installation
Face, therefore can be by between cylindrical portion lower end when so secure component being made to be bent 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 for tool using the various directions of process and greatly
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 recorded in the patent document 1 has following problem：
Since the pin hole side of cutting tip abuts in the substantially whole length of the centerline direction of secure component with cylindrical portion,
It is difficult to be bent secure component.In addition, due to pin hole side in the substantially whole length of the centerline direction of secure component with circle
Canister portion abuts, therefore the contact area between the pin hole side and the cylindrical portion is also larger, and in cylindrical portion to tool body
Frictional resistance when rear end side pressing pin hole side is also larger, to it is also possible to leading to cutting tip when tightening secure component
Offset movement.
Invention content
The present invention proposes in this background, its purpose is to provide a kind of indexable insert blade type cutting element,
Can realize as described above the pressing force of cutting tip it is stabilized simultaneously, additionally it is possible to so that secure component (pinching screw) is easy to
Bending, and can prevent such as the situation the cutting tip offset movement when tightening.
To solve the above-mentioned problems and realize this purpose, in the indexable insert blade type cutting element of the present invention, cutting
It is clamped in the blade mounting base that blade passes through the slit-shaped for being seated at the front end for being formed in tool body and 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 in the vane body：It takes a seat
Face can be abutted with the mounting base bottom surface of the blade mounting base；Through hole penetrates through the vane body for the pinching screw
Insert；With two sides, which is open on described two sides, in the blade installation for pressing described two sides
In two mounting base wall surfaces relative to each other of seat, reference for installation hole and threaded hole are formed on a mounting base wall surface, and
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 has phase
For the threaded hole center line and to the center line of tool body rear end eccentricity, in the one end shape of the pinching screw
At there is the external thread part being screwed into the threaded hole, being formed in the other end has and can be slided with the coniform supporting surface
The head of the conical surface-shaped peripheral surface of contact is formed with cylindrical portion, the cylinder between the external thread part and the head
The inner circumferential of the peripheral surface and the tool body front end side in the reference for installation hole by the one end side of the pinching screw in portion
Face abuts, and the peripheral surface of the other end side and the blade master are more depended in reference for installation hole described in the ratio of the cylindrical portion
The inner peripheral surface of tool body rear end side in the through hole of body abuts, in the direction of the through hole blade master of the vane body
At least one of the opening portion of described two sides of body opening portion is formed with wide diameter portion, and the internal diameter of the wide diameter portion is more than institute
State the internal diameter of the part abutted with the cylindrical portion of the pinching screw in through hole.
In the indexable insert blade type cutting element so constructed, when installing cutting tip by being screwed into pinching screw
When, the formation of pinching screw has the tool of the peripheral surface and the reference for installation hole of the cylindrical portion in the one end side of external thread part
The inner peripheral surface sliding contact of body front end side, therefore these inner and outer circumferential surfaces are as the indexable insert blade type recorded in patent document 1
Datum clamp face in cutting element plays a role.Therefore, with the indexable insert blade type cutting element recorded in patent document 1
Equally, the pressing force of cutting tip can be stablized, to the load in the various directions and size that can also be directed to when machining
High-precision cutting tip installation accuracy is maintained, and obtains higher machining accuracy.
Also, in the indexable insert blade type cutting element of above structure, further in the court of the through hole of vane body
At least one of opening portion to described two sides opening portion is formed with wide diameter portion, and the internal diameter of the wide diameter portion is more than described
The internal diameter of the part abutted with the cylindrical portion of pinching screw in through hole, therefore can be by the wide diameter portion in through hole and folder
Interval between the cylindrical portion of tight screw can be such that pinching screw is readily bent when being clamped and fixed cutting tip.Therefore,
It can also be screwed into power with less and conscientiously and be stably installed at cutting tip in blade mounting base.
In addition, due to the interval between through hole and cylindrical portion so in the wide diameter portion, clamping can be reduced
Contact area between the cylindrical portion and through hole of screw, and pinching screw can also be reduced to tool body rear end side with this
Frictional resistance when through hole is pressed, therefore can be prevented such as when tightening pinching screw (in the fastening of pinching screw that is near completion
The such situation of vane body offset movement before).Therefore the further high precision int of cutting tip installation accuracy, energy can be realized
Enough further increase machining accuracy.
In particular it is preferred that in two sides of the vane body, at least towards by one mounting base wall surface
The opening portion of the through hole of the side of pressing is formed with the wide diameter portion.The cylindrical portion of pinching screw is by forming as a result,
There is the side of the datum clamp face pressing in reference for installation hole not contacted with through hole.Thus, for example in cylindrical portion
When being screwed into pinching screw in the case that gap between the through hole of the part abutted with for the cylindrical portion is smaller, this can be passed through
Kind contacts to prevent the installation runout accuracy error of vane body.
In addition, in contrast to this, it can also be in two sides of the vane body, at least towards by described another
The opening portion of the through hole of the side of a mounting base wall surface pressing is formed with the wide diameter portion.Pass through pinching screw as a result,
Bending, the circle as datum clamp face for being located proximate to pinching screw that the peripheral surface of cylindrical portion can be made to be contacted with through hole
The one end side peripheral surface of canister portion.Therefore, even if can reinforce if the amount of bow of pinching screw is identical with the one end side periphery
Face is point action in the pressing force on the position that cylindrical portion is contacted with through hole, and can be more secured by cutting tip 3
Ground is fixed in blade mounting base 2.Moreover, because being formed with wide diameter portion, therefore energy in the larger side of the bending of pinching screw
Enough increase amount of bow itself.It is of course also possible to which the both sides in the side of vane body form the expanding hole, in this case can
Obtain above-mentioned two effect.
Additionally, it is preferred that the depth of the wide diameter portion from being formed with the side of the vane body of the wide diameter portion is set
For the expanding amount more than the wide diameter portion relative to the radial direction of the center line of the through hole.Thereby, it is possible to effectively drop
While contact area between the cylindrical portion and through hole of low pinching screw, it can prevent from too greatly extracting because of wide diameter portion passing through
The opening portion of through-hole.Therefore, it is possible to prevent from cutting sulfonal sample from through hole generation such as in the vane body for being clamped screw pressing
The case where.
As described above, in accordance with the invention it is possible to keep the pressing force of the cutting tip generated by pinching screw stabilized
Simultaneously, additionally it is possible to by cutting tip conscientiously and accurately be mounted on blade mounting base on, so as to realize cutting for higher precision
Cut processing.
Description of the drawings
Fig. 1 is the side view of the front end for the indexable insert blade type cutting element for indicating one embodiment of the present invention.
Fig. 2 is the ZZ sectional views in Fig. 1.
Fig. 3 is the figure for the ZZ sectional views for indicating second embodiment of the present invention, being equivalent in Fig. 1.
Fig. 4 is the figure for the ZZ sectional views for indicating third embodiment of the present invention, being equivalent in Fig. 1.
Specific implementation mode
Fig. 1 and Fig. 2 is the figure for indicating the first embodiment of the present invention.The indexable insert blade type skiver of present embodiment
Tool is 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 generally cylindrical tool body of shape 1 front end (left part in Fig. 1 and Fig. 2) slit-shaped blade mounting base
It is clamped and (cutting tip 3 is clamped in blade mounting base 2 by fastening pinching screw 4) on 2 and by pinching screw 4, to
Cutting tip 3 is detachably mounted in blade mounting base 2, wherein the cutting tip 3, which has, is formed with arc-shaped cutting
The vane body 3b of sword 3a.In this indexable insert blade type cutting element, the shank section (not shown) of 1 rear end side of tool body
Held on the main shaft of lathe, to the indexable insert blade type cutting element rotated around axes O while usually to axes O
The direction of intersection is sent out, and carries out machining to workpiece such as metal molds by above-mentioned cutting edge 3a.In addition, in this embodiment party
In formula, the direction of shank section towards blade mounting base 2 in the extending direction of axes O, from tool body 1 is known as front end side
Direction from blade mounting base 2 towards shank section is known as the rear end side (right side in Fig. 1 and Fig. 2 by (left side in Fig. 1 and Fig. 2)
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, it will
Direction 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 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 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 with center is mounted in blade mounting base 2 in the axes O.Change speech
It, vane body 3b is mounted in such a way that the cutting edge 3a circular arcs for being in are centrally through axes O in blade mounting base 2.Separately
Outside, it is circular through hole 3e that section is formed on vane body 3b, and the through hole 3e, which has, passes through above-mentioned cutting edge 3a
The center line and perforation vane body 3b of the approximate centre for the circular arc for being in, and be open on the 3c of above-mentioned two side.
On the other hand, hardness by hardness less 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 axes O and the above-mentioned center line of through hole 3e of vane body 3b
When, the insert mounting base 2 for being formed in the front end of this tool body 1 is formed in the front end side of tool body 1 with U
The slit-shaped of font opening, i.e. the blade mounting base 2 have：Two opposite mounting base wall surface 2a, 2b, parallel to each other and and axis
Line 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 base walls
Face 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 with so that the 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, to which cutting tip 3 is landed in blade mounting base 2 in such a way that the center line of through hole 3e is 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 so that cutting tip 3 is landed in blade mounting base 2, the reference for installation hole 5 and the threaded hole 6 face 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 contacts.In the present embodiment,
Reference for installation hole 5 is formed to be open on mounting base wall surface 2a, and in the bottom hole in the reference for installation hole 5 (diameter is outward)
It is formed with threaded hole 6.
Wherein, threaded hole 6 extends in such a way that its center line L1 is orthogonal with axes O.In addition, reference for installation hole 5 is in along axis
The elongated hole-shape that the directions line O extend, i.e. reference for installation hole 5 is formed on the section parallel with mounting base wall surface 2a by a circle
Pass through rectangular (square) of the width equal with the diameter between its diametrically two semicircles after the segmentation of axes O direction
Come the shape being formed by connecting.It is located in threaded hole 6 positioned at the center of the semicircle of the front end side of tool body 1 in these semicircles
On heart line L1, 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 the installation of 1 side of tool body
Reference plane 5a.In addition, internal diameter (the screw thread bottom of threaded hole 6 of the internal diameter (said one diameter of a circle) of these semicircles than threaded hole 6
The diameter of (ネ ジ paddy)) 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, on the 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 along the front end side of 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 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.Eccentricity (center line L1
The distance between center line L2) preferred scope it 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 of mode 4 is M8, preferably eccentricity is 0.03~0.1.In addition, in the recessed circular cone
The bottom hole (the inside square end of diameter in recessed coniform hole 7) in shape hole 7 between the second mounting base wall surface 2b, with recessed 7 phase of coniform hole
Mode even is formed with long hole portion 7b of the internal diameter more than the internal diameter in reference for installation hole 5.Long hole portion 7b is formed a circle is (straight
Diameter is more 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 the 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 open on the second mounting base wall surface 2b as follows：That is 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 contacts.
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), head 4b is threaded by external thread part 4a
When in hole 6 can with above-mentioned coniform supporting surface 7a sliding contacts and with towards one end side and gradually undergauge circular cone
The peripheral surface of planar.In addition, be formed with connecting hole 4c on the end face of head 4b, connecting hole 4c (makes being screwed into pinching screw 4
The external thread part 4a of pinching screw 4 is screwed togather with threaded hole 6) or while unclamping pinching screw 4 grasp action tool with spanner etc. and engage.
In addition, being formed with cylindrical portion 4d between these external thread parts 4a and head 4b.Cylindrical portion 4d is in its peripheral surface
The outer diameter of barrel surface centered on the center line of pinching screw 4, cylindrical portion 4d is set to the outer diameter than external thread part 4a
Slightly larger and smaller than the internal diameter of the inner peripheral surface of the front end side as above-mentioned datum clamp face 5a in reference for installation hole 5 and difference is extremely
It is subtle.When external thread part 4a is screwed into threaded hole 6 as described above, the peripheral surface of cylindrical portion 4d can be with datum clamp face
5a sliding contacts.In the present embodiment, it is provided between cylindrical portion 4d and external thread part 4a comprising incomplete thread portion
Interconnecting piece.It is preferred that interconnecting piece has the periphery of cylinder planar, and the interconnecting piece has the bottom diameter (paddy less than external thread part 4a
Diameter) outer diameter.
Also, in the above-mentioned through hole 3e of vane body 3b, in the above-mentioned two side 3c towards vane body 3b
At least one of opening portion opening portion on be formed with wide diameter portion 3f, the internal diameter of wide diameter portion 3f is more than in through hole 3e
The part abutted with the above-mentioned cylindrical portion 4d of pinching screw 4 internal diameter.In the present embodiment, in the direction two of through hole 3e
The both sides of the opening portion of a side 3c are formed with this wide diameter portion 3f, and above-mentioned cylindrical portion 4d and the two in through hole 3e are expanding
Part between portion 3f abuts.In other words, through hole 3e is by barrel surface and two wide diameter portion 3f constructions, wherein the barrel surface quilt
Be formed as abutting with the cylindrical portion 4d of pinching screw 4, the internal diameter of wide diameter portion 3f is more than the internal diameter of barrel surface and in side 3c
The mode of upper opening is arranged at the both ends of barrel surface.
In the present embodiment, wide diameter portion 3f has：Bottom surface, it is parallel with the above-mentioned side 3c of vane body 3b and in
Annular shape centered on the center line (center line of the barrel surface of through hole 3e) of through hole 3e；And inner peripheral surface, with from the bottom
Facing towards the side sides 3c that wide diameter portion 3f is open and it is gradually expanding and in circular cone centered on the center line of through hole 3e
Planar.The form and dimension that each wide diameter portion 3f is formed the wide diameter portion 3f of two sides sides 3c is mutually the same.In addition, from formation
(wide diameter portion 3f is in through hole for the depth of wide diameter portion 3f until having the side 3c to the above-mentioned bottom surface of wide diameter portion 3f of wide diameter portion 3f
Length on the centerline direction of 3e) be more than wide diameter portion 3f relative to the center line of through hole 3e radial direction (with through hole
The orthogonal direction of the center line of 3e) expanding amount, i.e. the depth of wide diameter portion 3f is more than the radius of the wide diameter portion 3f in the 3c of side
(maximum value of the inside radius of wide diameter portion 3f) and the radius for the part of through hole 3e abutted for pinching screw 4 be (through hole 3e's
The inside radius of barrel surface) difference.In addition, the preferred scope of the expanding amount of wide diameter portion 3f according to the thread size of pinching screw 4 and
It is different.For example, in the case where the thread size of pinching screw 4 as in the present embodiment is M8, the expanding amount of wide diameter portion 3f
Preferably the 10~50% of wide diameter portion depth are more preferably 20~40%, and but not limited to this.
In addition, for the through hole 3e of vane body 3b, the position of the center line of through hole 3e is set as follows
Set the internal diameter between the part (barrel surface of through hole 3e) that is abutted with cylindrical portion 4d：I.e. as described above by making to take a seat
Face 3d is abutted with mounting base bottom surface 2c and is inserted pinching screw 4 in the state of so that vane body 3b is landed in blade mounting base 2,
When starting external thread part 4a to be screwed into threaded hole 6, the cylindrical portion 4d of pinching screw 4 peripheral surface and through hole 3e with circle
The inner peripheral surface of 1 rear end side section of tool body in the part (barrel surface) that canister portion 4d is abutted is spaced apart very small interval.
In the present embodiment, the internal diameter of the internal diameter of the barrel surface of through hole 3e and the inner peripheral surface of the semicircular cylinder planar of datum clamp face 5a
It is roughly the same.
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 when starting external thread part 4a to be screwed into threaded hole 6, in the center line and the threaded hole 6 that clamp screw thread 4
Heart line L1 is coaxial, but the coniform supporting surface 7a sliding contacts of the peripheral surface and recessed coniform hole 7 as the head 4b of pinching screw 4
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 peripheral surface of its cylindrical portion 4d is connected to the part between wide diameter portion 3
The inner peripheral surface of 1 rear end side of tool body of through hole 3e in (barrel surface of through hole 3e), and vane body 3b is pressed
To the mounting base bottom surface 2c of blade mounting base 2.In addition, at the same time, due to the head 4b of pinching screw 4 be pushed to it is coniform
Supporting surface 7a, narrower intervals between two mounting base wall surfaces 2a, 2b of blade mounting base 2 and press two of vane body 3b
Cutting tip 3 is clamped and is fixed in blade mounting base 2 by these pressings by side 3c.
Here, due to when pinching screw 4 starts bending, the periphery of the one end side (sides external thread part 4a) of cylindrical portion 4d
The datum clamp face 5a sliding contacts in face and 1 front end side of tool body in reference for installation hole 5, therefore pinching screw 4 is with such as lower section
Formula continues to be bent：That is, the head sides 4b in the peripheral surface of the one end side of cylindrical portion 4d with datum clamp face 5a slidings to connect
Tactile part is that fulcrum is tilted to the rear end side of tool body 1.That is, since cylindrical portion 4d and datum clamp face 5a slidings connect
Tactile part plays a role as the datum clamp face of 4 side of pinching screw, and passes through the datum clamp face of 1 side of tool body
5a constrains pinching screw 4 in the front end side of tool body 1 and peripheral side (diameter is outward), therefore no matter cuts in the cutting process
It cuts sword 3a and load in any direction is applied to cutting tip 3, also cutting tip 3 can be firmly held in blade mounting base 2
On.
Further, since in the indexable insert blade type cutting element of above structure, in through hole 3e towards side 3c's
Opening portion is formed with wide diameter portion 3f, and the internal diameter of wide diameter portion 3f is more than being supported with the cylindrical portion 4d of pinching screw 4 in through hole 3e
The internal diameter of the part (barrel surface of through hole 3e) connect, thus in wide diameter portion 3f can cylindrical portion 4d and through hole 3e it
It is spaced apart larger interval and pinching screw 4 is made to be readily bent.Therefore, it is possible to grasp action tool by making spanner etc. and engage
It is smaller, and energy that hole 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,
Pinching screw 4 is enough set effectively to be bent and cutting tip 3 is firmly secured in blade mounting base 2.This can fully be obtained
Length (depth of wide diameter portion 3f) of the wide diameter portion 3f of kind effect on the centerline direction of through hole 3e is according to pinching screw 4
Thread size and it is different.For example, in the case where the thread size of pinching screw 4 as in the present embodiment is M8, wide diameter portion
The above-mentioned length of 3f is preferably the 10~50% of the length of through hole 3e, is more preferably 20~40%, but not limited to this.
In addition, due to the interval so between wide diameter portion 3f and cylindrical portion 4d, cylindrical portion 4d is in wide diameter portion 3f
In will not be contacted with through hole 3e, to which contact area between pinching screw 4 and through hole 3e is smaller.Thus, it is also possible to will
Pinching screw 4 when pinching screw 4 abuts with through hole 3e and presses from vane body 3b to the rear end side of tool body 1 and perforation
Frictional resistance control between the 3e of hole is smaller, so as to prevent the clamping spiral shell before it will be completely fixed cutting tip 3
Vane body 3b offset movements when tightening of nail 4, and cutting tip 3 can be mounted on blade mounting base with higher precision
Machining accuracy is improved on 2.
Moreover, in the present embodiment, the both sides in the opening portion of two sides 3 of direction of through hole 3e are formed with expanding
Portion 3f, therefore the contact area between through hole 3e and cylindrical portion 4d can be further reduced, to further decrease friction resistance
Power.In addition, since the two wide diameter portions 3f is formed identical shapes and sizes, the wide diameter portion 3f's from each side 3c is upper
It is also equal to state depth.Therefore, the central portion of the centerline direction of through hole 3e is abutted with the cylindrical portion 4d of pinching screw 4.Therefore,
Cutting tip 3 can be balancedly pressed on the thickness direction (left and right directions in Fig. 2) of insert main body 3b, to cut
Paring blade 3 is more stably mounted in blade mounting base 2.In addition, the barrel surface of through hole 3e is in the center line side of through hole 3e
The preferred scope of upward length is different according to the thread size of pinching screw 4.For example, clamping as in the present embodiment
In the case that the thread size of screw 4 is M8, the above-mentioned length of the barrel surface of through hole 3e is preferably the thickness of vane body 3b
The 10~50% of (the distance between two side 3c), more preferably 20~40%, but not limited to this.
In addition, in these present embodiments, it is expanding from being formed with the side 3c of vane body 3b of wide diameter portion 3f
The depth of portion 3f is more than expanding amounts of the wide diameter portion 3f relative to the radial direction of the center line of through hole 3e.Therefore, it is possible to prevent
The wall thickness of vane body 3b in the opening portion periphery of through hole 3e around wide diameter portion 3f is excessively reamed, so as to anti-
It only generates to cut on vane body 3b due to the pressing of pinching screw 4 and damages such situation.
Moreover, because the wide diameter portion 3f in present embodiment has with the side sides 3c for having wide diameter portion 3f towards opening
And gradual expanding conical surface-shaped inner peripheral surface, the conical surface-shaped inner peripheral surface, therefore will not centered on the center line of through hole 3e
Hinder the bending of pinching screw 4.On the other hand, due to can the side opposite with side 3c, in wide diameter portion 3f with
The part that the part of through hole 3e abutted for cylindrical portion 4d is adjacent is (adjacent with the barrel surface of through hole 3e in wide diameter portion 3f
Part) ensure the wall thickness of larger vane body 3b, therefore can also be prevented securely from vane body 3b cut damage etc..But
It's not limited to that for the shape of wide diameter portion 3f, and wide diameter portion 3f can also have circular bottom surface as described above and with through hole
Cylinder planar inner peripheral surface centered on the center line of 3e, i.e. through hole 3e can also be formed as with the level poroid.
Then, Fig. 3 and Fig. 4 is ZZ sectional views indicating second and third embodiment of the present invention, being equivalent in Fig. 1
Figure, pair with Fig. 1 and second embodiment shown in Figure 2 common part use identical reference numeral.Wherein, in Fig. 3
Shown in second embodiment, the wide diameter portion 3f of cutting tip 3 is only formed in court in two side 3c of vane body 3b
To on the opening portion of the through hole 3e of the side 3c pressed by the first mounting base wall surface 2a for being formed with reference for installation hole 5, clamp
The cylindrical portion 4d of screw 4 and from wide diameter portion 3f to vane body 3b by the side 3c of the second mounting base wall surface 2b pressing
Through hole 3e inner peripheral surface abut.That is, through hole 3e is constructed by barrel surface and wide diameter portion 3f, wherein the barrel surface is by the
It is open on the side 3c of two mounting base wall surface 2b pressings, wide diameter portion 3f is on by the side 3c of the first mounting base wall surface 2a pressings
It is open and with the internal diameter more than barrel surface.
As the second embodiment or above-mentioned first embodiment, in two side 3c in vane body 3b,
At least in the opening portion of the through hole 3e of the side 3c towards the first mounting base wall surface 2a pressings by being formed with reference for installation hole 5
In the case of being formed with above-mentioned wide diameter portion 3f, the cylindrical portion 4d of pinching screw 4 is in the side pressed by the first mounting base wall surface 2a
The face sides 3c will not be contacted with through hole 3e.Therefore, because when continuing to be screwed into pinching screw 4, in through hole 3e and cylindrical portion 4d
Between ensure sufficient gap, part towards 1 front end side of tool body in the peripheral surface of cylindrical portion 4d can be avoided and passed through
Through-hole 3e contacts.Therefore, it is possible to prevent due to this contact, vane body 3b is rotated centered on through hole 3e and generates installation
Runout accuracy error.
On the other hand, in third embodiment shown in Fig. 4, the wide diameter portion 3f in the through hole 3e of cutting tip 3 exists
It is only formed in two side 3c of vane body 3b towards the second installation for forming recessed coniform hole 7 by tool body 1
On the opening portion of the through hole 3e of the side 3c of seat wall surface 2b pressings.In the third embodiment, the cylindrical portion of pinching screw 4
4d and from wide diameter portion 3f to vane body 3b by the through hole 3e's the side 3c of the first mounting base wall surface 2a pressing
Inner peripheral surface abuts.That is, through hole 3e is constructed by barrel surface and wide diameter portion 3f, wherein the barrel surface is by the first mounting base wall surface
It is open on the side 3c of 2a pressings, wide diameter portion 3f is open on by the side 3c of the second mounting base wall surface 2b pressings and with big
In the internal diameter of barrel surface.
As the third embodiment or above-mentioned first embodiment, in two side 3c in vane body 3b,
At least towards by the second mounting base wall surface 2b pressing opposite with the first mounting base wall surface 2a in reference for installation hole 5 is formed with
It is entire at it with second embodiment or through hole 3e when the opening portion of the through hole 3e of side 3c is formed with above-mentioned wide diameter portion 3f
Compared with the case where being abutted with cylindrical portion 4d in length (the case where not forming wide diameter portion 3f), it can make curved because of pinching screw 4
The bent and cylindrical portion as datum clamp face for being located proximate to pinching screw 4 that the peripheral surface of cylindrical portion 4d is contacted with through hole 3e
One end side (sides external thread part 4a) peripheral surface of 4d.Therefore, can reinforce if even if the amount of bow of pinching screw 4 is identical with
The one end side peripheral surface be point action in the pressing force on the position that cylindrical portion 4d is contacted with through hole 3e, and can general
Cutting tip 3 is more securely fixed in blade mounting base 2.Moreover, because being formed in the side that pinching screw 4 is substantially bent
There is wide diameter portion 3f, therefore amount of bow itself is also larger, can further firmly fix cutting tip 3.
In addition, at these first in third embodiment, the rotational trajectory about the cutting edge 3a to cutting tip 3 is in
The situation of the hemispherical indexable insert blade type ball end mill application present invention is illustrated, but can also be to being both indexable
For example following square toes slotting cutter or radius end mill of blade type slotting cutter is with the application of the invention, wherein, the square toes slotting cutter
It is that cutting edge is connected by edge with the shear blade of axes O generally perpendicular direction extension and with the outer circumference end (diameter is held outward) of the shear blade
And the slotting cutter that the rotational trajectory rotated around axes O is constructed in the peripheral edge of the cylinder planar centered on axes O, the arc head
Slotting cutter is the slotting cutter for the basil that arc-shaped is formed on the corner that these peripheral edges are intersected with shear blade.Further, it is also possible to
With the application of the invention, it for example can also be to the indexable insert blade type drill bit application present invention to the cutting element other than slotting cutter.
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.
Reference sign
1 tool body
2 blade mounting bases
2a, 2b mounting base wall surface
2c mounting bases bottom surface
3 cutting tips
3a cutting edges
3b vane bodies
The sides 3c
3d takes a seat face
3e through holes
3f wide diameter portions
4 pinching screws
4a external thread parts
The heads 4b
4c connecting holes
4d cylindrical portions
5 reference for installation holes
5a datum clamp faces
6 threaded holes
7 recessed coniform holes
The coniform supporting surfaces of 7a
7b long hole portions
The axis of O tool bodies 1
The center line of L1 threaded holes 6
The center line of the coniform supporting surface 7a of L2
Claims (4)
1. a kind of indexable insert blade type cutting element, cutting tip is by being seated at the slit of the front end for being formed in tool body
It is clamped in the blade mounting base of shape and by pinching screw, to which 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,
It is formed in the vane body：It takes a seat face, can be abutted with the mounting base bottom surface of the blade mounting base；Perforation
Hole penetrates through the vane body so that the pinching screw is inserted；With two sides, which opens on described two sides
Mouthful,
In the two mounting base wall surfaces relative to each other for pressing the blade mounting base of described two sides, installed at one
It is formed with reference for installation hole and threaded hole on seat wall surface, and is formed in the tool body front end side of another mounting base wall surface
Coniform supporting surface, the coniform supporting surface there is the center line relative to the threaded hole and to tool body rear end lateral deviation
The center line of the heart,
It is formed with the external thread part being screwed into the threaded hole in the one end of the pinching screw, head is formed in the other end
Portion, the head have can with the conical surface-shaped peripheral surface of the coniform supporting surface sliding contact,
Be formed with cylindrical portion between the external thread part and the head, the cylindrical portion by described the one of the pinching screw
The peripheral surface of end side is abutted with the inner peripheral surface of the tool body front end side in the reference for installation hole, and the ratio of the cylindrical portion
After the tool body in the peripheral surface of the other end side and the through hole of the vane body is more leaned in the reference for installation hole
The inner peripheral surface of end side abuts,
At least one of opening portion in described two sides of the direction of through hole of the vane body vane body
Opening portion is formed with wide diameter portion, and the internal diameter of the wide diameter portion is more than being supported with the cylindrical portion of the pinching screw in the through hole
The internal diameter of the part connect.
2. indexable insert blade type cutting element according to claim 1, which is characterized in that
In two sides of the vane body, at least towards described in the side by the pressing of one mounting base wall surface
The opening portion of through hole is formed with the wide diameter portion.
3. indexable insert blade type cutting element according to claim 1, which is characterized in that
In two sides of the vane body, at least in the institute towards the side by the pressing of another described mounting base wall surface
The opening portion for stating through hole is formed with the wide diameter portion.
4. indexable insert blade type cutting element according to any one of claims 1 to 3, which is characterized in that from formation
There is the depth of the wide diameter portion of the side of the vane body of the wide diameter portion to be passed through relative to described more than the wide diameter portion
The expanding amount of the radial direction of the center line of through-hole.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-234767 | 2015-12-01 | ||
| JP2015234767 | 2015-12-01 | ||
| PCT/JP2016/084270 WO2017094531A1 (en) | 2015-12-01 | 2016-11-18 | Replaceable cutting edge cutting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108290234A true CN108290234A (en) | 2018-07-17 |
| CN108290234B CN108290234B (en) | 2019-07-12 |
Family
ID=58797266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680030152.3A Active CN108290234B (en) | 2015-12-01 | 2016-11-18 | Indexable insert blade type cutting element |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6447746B2 (en) |
| KR (1) | KR102025534B1 (en) |
| CN (1) | CN108290234B (en) |
| WO (1) | WO2017094531A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111761111A (en) * | 2019-04-01 | 2020-10-13 | 京瓷株式会社 | End milling cutter |
| CN113453827A (en) * | 2019-02-20 | 2021-09-28 | 京瓷株式会社 | Tool holder, cutting tool, method for manufacturing cut product, and method for collecting data |
| CN114762900A (en) * | 2021-01-13 | 2022-07-19 | 株式会社泰珂洛 | Tool body |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| JP4628113B2 (en) * | 2005-01-13 | 2011-02-09 | オーエスジー株式会社 | Throw-away cutting tool and throw-away tip |
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2016
- 2016-11-18 JP JP2017553775A patent/JP6447746B2/en active Active
- 2016-11-18 KR KR1020177035792A patent/KR102025534B1/en active IP Right Grant
- 2016-11-18 CN CN201680030152.3A patent/CN108290234B/en active Active
- 2016-11-18 WO PCT/JP2016/084270 patent/WO2017094531A1/en active Application Filing
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| JPH11239911A (en) * | 1997-12-26 | 1999-09-07 | Hitachi Tool Eng Ltd | Throwaway cutting tool |
| JP2008183661A (en) * | 2007-01-30 | 2008-08-14 | Kyocera Corp | Cutting insert, cutting tool using it, and manufacturing method of cutting insert |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113453827A (en) * | 2019-02-20 | 2021-09-28 | 京瓷株式会社 | Tool holder, cutting tool, method for manufacturing cut product, and method for collecting data |
| CN113453827B (en) * | 2019-02-20 | 2023-12-15 | 京瓷株式会社 | Tool shank, cutting tool, method for manufacturing cut product, and method for collecting data |
| CN111761111A (en) * | 2019-04-01 | 2020-10-13 | 京瓷株式会社 | End milling cutter |
| CN114762900A (en) * | 2021-01-13 | 2022-07-19 | 株式会社泰珂洛 | Tool body |
| CN114762900B (en) * | 2021-01-13 | 2023-11-21 | 株式会社泰珂洛 | Tool body |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017094531A1 (en) | 2017-06-08 |
| JP6447746B2 (en) | 2019-01-16 |
| KR20180005707A (en) | 2018-01-16 |
| JPWO2017094531A1 (en) | 2018-03-08 |
| KR102025534B1 (en) | 2019-09-26 |
| CN108290234B (en) | 2019-07-12 |
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