CN102886533B - Cutter holder and main shaft device - Google Patents
Cutter holder and main shaft device Download PDFInfo
- Publication number
- CN102886533B CN102886533B CN201110421132.8A CN201110421132A CN102886533B CN 102886533 B CN102886533 B CN 102886533B CN 201110421132 A CN201110421132 A CN 201110421132A CN 102886533 B CN102886533 B CN 102886533B
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- China
- Prior art keywords
- cutter holder
- shaft
- cutter
- rotating shaft
- face
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/043—Accessories for spindle drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/11—Retention by threaded connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/34—Chucks with means enabling the workpiece to be reversed or tilted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/26—Securing milling cutters to the driving spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2270/00—Details of milling machines, milling processes or milling tools not otherwise provided for
- B23C2270/10—Use of ultrasound
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention provides a kind of cutter holder and main shaft device, this cutter holder (20) is installed on the rotating shaft (4) of main shaft device and keeps cutter (50), ensure that easily assembling relative to rotating shaft (4) and at least not easily produces the deviation of the setting angle relative to rotating shaft (4).Consist of: be provided with the cutter fixed part (21) that cutter (50) is fixed in tip side, the cardinal extremity face (22) (cutter holder side engagement face) engaged with the top end face of rotating shaft (4) (10) (rotation shaft side composition surface) is formed at base end side, be formed from the center of cardinal extremity face (22) installation shaft (23) outstanding to axis at base end side in addition, the threaded portion (28) screwed togather with the screwed hole (11) be formed centrally in the top of rotating shaft (4) is formed in the periphery of this installation shaft (23), the structure (there is the structure of gap (29)) that installation shaft (23) is elastically deformable.
Description
Technical field
The present invention relates to a kind of cutter holder and use the main shaft device of this cutter holder.
Background technology
Usually, the main shaft device that Drilling operation, milling machine processing etc. adopt, such as disclosed in documents 1, is the device that a kind of top has the rotating shaft (main shaft) being provided with cutter (instrument).In this main shaft device, be used for keeping the cutter holder (sometimes also referred to as fixture etc.) of cutter to be installed for rotating shaft by press-in, screw-in or hot charging in the past, fix for rotating shaft.Such as, disclose tool holder 3 (hot charging fixture 30) is fixed on the fixing hole 2a of rotary main shaft 2 structure by being pressed in Fig. 1 and Fig. 2 of patent document 1.
Patent document 1: Japanese Unexamined Patent Publication 2010-207972 publication
But, in above-mentioned main shaft device in the past, about the installation constitution of cutter holder, there is problem as described below.
First, if by press-in, hot charging and the structure fixed by cutter holder on the rotary shaft, then the handling of cutter holder are more difficult, create such as in order to change under cutter, cutter holder also need the situations such as replacing, the problem that can not simply tackle.
In addition, if structure cutter holder fixed on the rotary shaft by screwing in, then the handling of cutter holder are comparatively easy, but, due to the mismachining tolerance (position deviation of angular deviation, radius strategy) of the screwed hole for screwing in cutter holder of rotating shaft, the setting angle deviation of easy generation cutter holder and bias, and then the problem such as setting angle deviation and bias causing cutter.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of cutter holder and use the main shaft device of this cutter holder, it guarantees the easily assembling of cutter holder, and for rotating shaft at least setting angle not easily produce deviation.
The present invention first technical scheme provides a kind of cutter holder, be installed on the screwed hole for mounting cutter, wherein, the cutter fixed part that cutter is fixed is provided with in the tip side of axis, be formed to axially outstanding installation shaft at the base end side contrary with the tip side of axis, and be positioned at the surrounding of root of this installation shaft and the cutter holder side engagement face that can engage with the composition surface of the entrance being formed as described screwed hole, the periphery of described installation shaft is formed with the threaded portion that described installation shaft can be tightened to described screwed hole, described installation shaft is the structure of elastically deformable, the segmentation that being configured to of described elastically deformable has from the top end face of described installation shaft to axially extended gap constructs, described gap is through in the radial direction of described installation shaft.
In addition, the present invention second technical scheme provides a kind of main shaft device, and this main shaft device has the rotating shaft that this cutter holder can be installed in cutter holder as above and top,
The top of described rotating shaft is formed with the screwed hole that can screw in described installation shaft, described cutter holder is installed to described rotating shaft by making described installation shaft screw in described screwed hole, around the entrance of the described screwed hole of described rotating shaft, be formed through and make described installation shaft screw in described screwed hole and the rotation shaft side composition surface engaged with described cutter holder side engagement face.
In addition, " joint " of the present invention is not limited to the whole state seamlessly contacted outwardly, the part being also included in the inherent composition surface of the scope of allowing leave gap state or with the gap in permissible range in relative state (such as, there is the intention ground of design, according to the relative state in the face of so-called movable fit).In addition, because " cutter holder side engagement face " of the present invention and " rotation shaft side composition surface " they are the surfaces be bonded with each other, so, certainly have and the setting angle of cutter holder is set as predetermined angular or the effect within the scope of predetermined angular.This means, " cutter holder side engagement face " of the present invention and " rotation shaft side composition surface " at least can play a role as setting angle setting composition surface, and this setting angle setting composition surface is bonded with each other so that suitably set the setting angle of cutter holder.
Preferably, in the main shaft device of the present invention the 3rd technical scheme, as described cutter holder side engagement face and described rotation shaft side composition surface, be formed as the face of the effect with the centering composition surface be bonded with each other respectively, suitably to set the installation site of the radial direction of described cutter holder.
In addition, so-called " centering composition surface " be such as respectively by the center line of described rotating shaft or should be consistent with the center line of this rotating shaft cutter holder cutter fixed part axis centered by cone shape inclined plane or barrel surface, by making this inclined plane or barrel surface be bonded with each other, having and making the axis (center line of such as cutter) consistent (or consistent substantially) of the center line of described rotating shaft and described cutter fixed part thus the effect eccentric (radial position deviation) being eliminated (or it is interior to be limited to prescribed limit).
Preferably, in the main shaft device of the present invention the 4th technical scheme, as described cutter holder side engagement face and described rotation shaft side composition surface, be formed as the face of the effect on the ultrasonic propagation composition surface had for propagate ultrasound waves, this main shaft device have make described rotating shaft carry out ultrasonic wave vibration add the portion of shaking.
Preferably, in the main shaft device of the present invention the 5th technical scheme, at least about described ultrasonic propagation composition surface, the material forming described cutter holder side engagement face is different on ultrasonic propagation velocity from the material forming described rotation shaft side composition surface.
Invention effect:
The cutter holder of the present invention first technical scheme by making integral-rotation, the installation shaft of this cutter holder screwed in the screwed hole formed on the top of the rotating shaft of main shaft device tighten, thus easily can be arranged on described rotating shaft and be fixed.In addition, by making overall reverse rotation, this installation shaft being got loose from described screwed hole, can easily dismantle.That is, cutter holder of the present invention easily can load and unload by screwing in.
And, even if described screwed hole is relative to the centerline dip of described rotating shaft, this inclination also can absorb by the elastic deformation of described installation shaft.Therefore, even if described screwed hole is relative to the centerline dip of described rotating shaft, by making described installation shaft be screwed into described screwed hole fully, the state that can realize making the cutter holder side engagement face of this cutter holder suitably to engage with the rotation shaft side composition surface being formed at described rotating shaft (state that such as whole surface is close to or at least do not have the state in abnormal large gap).Therefore, utilize the joint that described composition surface is mutual, as long as relative to described rotation shaft side composition surface towards setting described cutter holder side engagement face towards, the center line of the cutter fixed part making this cutter holder tip side and the cutter being fixed on this cutter fixed part towards consistent with the center line of described rotating shaft, even if then described screwed hole is relative to the centerline dip of described rotating shaft, cutter holder, cutter also can not be produced relative to the inclination (being at least excessive inclination) of described rotating shaft.Therefore, it is possible to guarantee the easily assembling of cutter holder, and at least cutter holder, cutter not easily produce deviation for the setting angle of described rotating shaft.
In addition, the cutter holder of the present invention first technical scheme also tool have the following advantages: process this simple operation of gap with extending vertically by the top end face such as from described installation shaft, easily and at an easy rate can realize the structure of described elastically deformable.
In addition, according to the main shaft device of the present invention second technical scheme, because there is described cutter holder and this cutter holder has the described installation shaft of elastically deformable, so the easily assembling of cutter holder can be guaranteed, at least not easily produce cutter holder, cutter for the deviation of the setting angle of described rotating shaft, the lower degradation unfavorable condition of the machining accuracy caused by this deviation can be prevented.
In addition, in the main shaft device of the present invention the 3rd technical scheme, described centering composition surface engages each other, so that suitably set the installation site of the radial direction of cutter holder when installing cutter holder.Therefore, even if described screwed hole produces position deviation diametrically, described installation shaft is screwed in described screwed hole, described cutter holder is installed to described rotating shaft state under, the certralizing ability utilizing the elastic deformation of described installation shaft and produced by the joint on described centering composition surface, also can make the center line of such as described rotating shaft and the center line of described cutter holder, cutter present consistent state (state that core is consistent).Therefore, cutter holder, cutter is also not easily produced for the deviation (bias) in the radial direction of the installation site of described rotating shaft.
In addition, in the main shaft device of the present invention the 4th technical scheme, described rotating shaft is made to carry out ultrasonic wave vibration by adding the portion of shaking, this vibration utilizes the joint on the ultrasonic propagation composition surface of the ultrasonic propagation composition surface of described rotation shaft side and described cutter holder side to propagate into cutter side effectively, therefore, it is possible to realize that can carry out so-called ultrasonic wave processing, that reliability is higher main shaft device.
In addition, this ultrasonic main shaft device ensure that the easily assembling of cutter holder, and, prevent (or reduction) cutter holder, cutter from, for deviation, the bias of the setting angle of rotating shaft, the raising etc. of machining accuracy can be realized.In addition, the advantage of ultrasonic wave processing has multiple, and such as one of advantage is can to not carrying out Precision Machining with the glass of common spindle processing, pottery etc.
In addition, in the main shaft device of the present invention the 5th technical scheme, can avoid producing crimping (state that contact and being difficult to is separated) between the ultrasonic propagation composition surface of described rotation shaft side and the ultrasonic propagation composition surface of cutter holder side that engages.In addition, once produce this crimping, even if then use screw-in mode also to there will be the slightly difficult unfavorable condition of dismounting cutter holder.Therefore, inventor recognizes after research: easily produce crimping each other at such as same material by ultrasonic wave vibration, but, if between the material that hyperacoustic spread speed is different, then can not produce the propagate ultrasound waves vibration of crimping ground.The understanding that the invention of the 5th technical scheme is these researchs based on inventor and obtains is made.
Accompanying drawing explanation
Fig. 1 (a) is the stereogram of ultrasonic main shaft device, and (b) is the front view of this device.
Fig. 2 (a) is the side view of ultrasonic main shaft device, and (b) is the top view of this device.
Fig. 3 is the side view representing the state this cutter holder being arranged on rotating shaft.
Fig. 4 (a) is the side view representing cutter holder, and (b) is the X direction of arrow view in (a).
Fig. 5 (a) is the base end part enlarged drawing of cutter holder, and (b) is the Y direction of arrow view in (a).
Fig. 6 (a) is the figure be described the effect of the installation shaft of elastically deformable, and (b) is the figure representing variation.
Fig. 7 (a) is the figure representing comparative example, and (b) is the figure be described the unfavorable condition of comparative example.
Reference numeral illustrates:
1 ... ultrasonic main shaft device; 2 ... ultrasonic main shaft main body; 4 ... rotating shaft (main shaft); 10 ... top end face (rotation shaft side composition surface, setting angle setting composition surface, ultrasonic propagation composition surface); 11 ... screwed hole; 12a ... inner peripheral surface (rotation shaft side composition surface, setting angle setting composition surface, centering composition surface); 20 ... cutter holder; 21 ... cutter fixed part; 22 ... cardinal extremity face (cutter holder side engagement face, setting angle setting composition surface, ultrasonic propagation composition surface); 23 ... installation shaft; 28 ... threaded portion; 29 ... gap; 30a ... outer peripheral face (cutter holder side engagement face, setting angle setting composition surface, centering composition surface); 41 ... the conical surface (rotation shaft side composition surface, setting angle setting composition surface, centering composition surface, ultrasonic propagation composition surface); 42 ... the conical surface (cutter holder side engagement face, setting angle setting composition surface, centering composition surface, ultrasonic propagation composition surface); 50 ... cutter.
Detailed description of the invention
Below, with reference to the accompanying drawings, embodiments of the invention one are described.
The present embodiment is example the present invention being adapted to ultrasonic main shaft device.The ultrasonic main shaft device 1 of the present embodiment, as Fig. 1 ~ Fig. 2, is made up of ultrasonic main shaft main body 2 and motor 3.Ultrasonic main shaft main body 2 has the rotating shaft 4 (main shaft) being driven rotation by motor 3, also have rotatable and the Bearning mechanism of this rotating shaft 4 can be kept quiveringly, on this rotating shaft 4 produce the ultrasonic wave corresponding with the signal inputted from outside vibrate add portion's of shaking (being such as made up of piezoelectric element), cooling body etc.In addition, the ultrasonic wave vibration being applied to rotating shaft 4 is the vibration that a kind of frequency is suitable with ultrasonic wave, and be generally axial vibration, its amplitude is such as only several μm.
As shown in Fig. 1 (a) etc., the top ends of rotating shaft 4 is exposed in the tip side of ultrasonic main shaft main body 2, is formed with spanner holding section 5 in the periphery of the position of slightly departing from this top end face.Spanner holding section 5 refers to the part being formed with the plane of hanging spanner in both sides, it is a kind of when making cutter holder 20 (shown in Fig. 3) described later rotate relative to rotating shaft 4 to load and unload, be used for making its non rotating according to rotating shaft 4, and on rotating shaft 4, engage the part of the instruments such as spanner.
In addition, ultrasonic main shaft main body 2 is provided with installation portion 6, and multiple (being 4 the in the present embodiment) installing hole 7 (shown in Fig. 2 (b)) be arranged on this installation portion 6 can insert construction bolt 8 (shown in Fig. 2 (a)).Ultrasonic main shaft device 1 is such as fixedly connected with by the construction bolt 8 of installing hole 7 inserting this installation portion 6 movable part that omits the work mechanism (such as, numerically-controlled machine etc.) illustrated in the drawings and uses.
In addition, as shown in Figure 3, be formed with top end face 10 at the outer circumferential side on the top of rotating shaft 4, this top end face 10 is the plane rectangular with the center line S1 of rotating shaft 4 (shown in Fig. 6 (a)).This top end face 10, because have screwed hole 11 described later and recess 12, so be circular when seeing from axis, and is positioned at the surrounding (outside of the recess described later 12 specifically, in radial direction) of the entrance of screwed hole 11.In addition, this top end face 10 is suitable with rotation shaft side composition surface of the present invention, both plays a role as setting angle setting composition surface, and also plays a role as ultrasonic propagation composition surface.In addition, at rotating shaft 4 axially, the distance between the aforementioned position adding the piezoelectric element in the portion of shaking in the position of this top end face 10 and ultrasonic main shaft main body 2 is formed as can the predetermined distance (wavelength vibrated with ultrasonic wave has the distance of prescribed relationship) of propagate ultrasound waves effectively.
In addition, the center on the top of rotating shaft 4 (namely, the position suitable with the center of circular top end face 10) be formed with the screwed hole 11 extended axially, in addition, the surrounding (inner side in the radial direction of circular top end face 10) of the intake section of this screwed hole 11 is formed with chimeric recess 12.The size of the internal diameter of recess 12 is more than the internal diameter of screwed hole 11, and the inner peripheral surface 12a (being cylindric face in this case) of this recess 12 is configured under the installment state of aftermentioned cutter holder 20: contact or leave relative slightly with gap with the outer peripheral face 30a (shown in Fig. 5 (a)) of the aftermentioned wide diameter portion 30 of cutter holder 20.Here, this inner peripheral surface 12a is suitable with rotation shaft side composition surface of the present invention, both plays a role as setting angle setting composition surface, and also plays a role as centering composition surface.
Then, according to Fig. 3 ~ Fig. 5, the cutter holder 20 being installed on ultrasonic main shaft device 1 is described.As shown in Figure 3, cutter holder 20 is installed on the top of the rotating shaft 4 of ultrasonic main shaft device 1, keeps cutter 50.As shown in Fig. 4 (a), cutter holder 20 is provided with the cutter fixed part 21 of fixed cutting tool in tip side (axial end side), the base end side contrary with tip side (another axial side) be formed with axially at right angles and the cardinal extremity face 22 that can engage with the described top end face 10 of rotating shaft 4, in addition, base end side is formed from the center in described cardinal extremity face 22 installation shaft 23 outstanding to axis.Here, cardinal extremity face 22 is planes rectangular with the center line S2 of cutter holder 20 (shown in Fig. 6 (a)), is the geomery that the described top end face 10 with rotating shaft 4 is corresponding.
This cardinal extremity face 22 be around a kind of root being positioned at installation shaft 23 (specifically, the outside of the aftermentioned wide diameter portion 30 in radial direction) circular, it is suitable with cutter holder side engagement face of the present invention, play a role as setting angle setting composition surface, also play a role as ultrasonic propagation composition surface.Namely, the cutter holder 20 of the present embodiment seamlessly engages by making the entirety in this cardinal extremity face 22 (or overall substantially) with the top end face 10 of rotating shaft 4, is close to, make center line S2 towards the center line S1 with rotating shaft 4 towards consistent (or consistent substantially), relative to rotating shaft 4 in suitable setting angle.In addition, by making this cardinal extremity face 22 and described top end face 10 (that is, and between axially rectangular plane) seamlessly be close to, ultrasonic wave can be effectively made to propagate from rotating shaft 4 to cutter 50.In addition, this cardinal extremity face 22 and the gapless joint of described top end face 10 also have the positioning action to the axis that cutter holder 20 position in the axial direction of the present embodiment sets certainly.
Shown in Fig. 4 (b), cutter fixed part 21 be formed extend vertically from the center of top end face, for inserting the cutter patchhole 24 of the base end part of cutter 50, in addition, be also formed with from top end face the gap 25 (otch) laterally disconnecting this cutter patchhole 24.The top ends of this cutter fixed part 21 is divided into two parts because having gap 25, can produce elastic deformation thus cutter patchhole 24 is reduced.
Shown in Fig. 4 (b), the both sides of the top ends of cutter fixed part 21 are configured to: can install the bolt 26 making the top ends of cutter fixed part 21 produce elastic deformation carrying out to keep.In addition, also be configured to can be following state: rotate to the direction of tightening by making bolt 26, the top ends of cutter fixed part 21 can be made to produce elastic deformation to the direction reducing cutter patchhole 24, clamp the base end part of the cutter 50 being inserted into cutter patchhole 24 with the both sides of cutter patchhole 24 and keep.In addition, also be configured to: rotate to lax direction by making bolt 26, make the top ends of cutter fixed part 21 recover (recovering to nature from elastic deformation) to the direction expanding cutter patchhole 24, thus, cutter 50 is extracted from cutter patchhole 24, dismantled.
In addition, in the axis (left and right directions of Fig. 4 (a)) of cutter holder 20, the position between cutter fixed part 21 and cardinal extremity face 22 is formed with spanner holding section 27.Spanner holding section 27 is formed with the part of plane of hanging spanner, spanner holding section 27 be in order to load and unload cutter holder 20 cutter holder 20 is rotated relative to rotating shaft 4 time, make cutter holder 20 engage the part of the instruments such as spanner.
In addition, as shown in Fig. 5 (a), on the periphery of installation shaft 23, be formed with the threaded portion 28 screwed togather with the screwed hole 11 being formed at described rotating shaft 4, installation shaft 23 can screw in screwed hole 11.In addition, installation shaft 23 is the structure that can produce elastic deformation.As shown in Figure 5, the present embodiment is the segmentation structure with the multiple gaps 29 (otch) be formed extended at both sides to axis from the top end face of installation shaft 23, thus, makes installation shaft 23 to produce elastic deformation.
In the present embodiment, as shown in Fig. 5 (b), from axial, on equal angular position, four gaps 29 are formed as radial in the circumferential.This gap 29 is formed as state (state at both-side opening) through in the radial direction of installation shaft 23, and is formed as in the axial direction only in the state of the top end face opening of installation shaft 23.As shown in Fig. 5 (b), by these gaps 29, installation shaft 23 is made to be that divided eight parts produce elastic deformation respectively from axially seeing the structure being split into eight parts, thus, compared with the single thread spindle not having this gap, especially easily produce elastic deformation on the whole.In addition, in this case, as shown in Fig. 5 (a), length (degree of depth of the otch) L2 of the axis in gap 29 sets larger than the length L1 of threaded portion 28, and is configured to threaded portion 28 and can carries out elastic deformation fully.
In addition, around the root portion (not forming the part of threaded portion 28) of the installation shaft 23 of cutter holder 20, as shown in Fig. 5 (a), be formed with wide diameter portion 30, by this installation shaft 23 being screwed in the described screwed hole 11 of rotating shaft 4, the described recess 12 of this wide diameter portion 30 embedded rotating axle 4.The size of the external diameter of wide diameter portion 30 is more than the profile of threaded portion 28, and the outer peripheral face 30a (being cylindric face in this case) of this wide diameter portion 30 is configured to contact or leave relative slightly with gap with the aforementioned inner peripheral surface 12a of rotating shaft 4 under the installment state of cutter holder 20.
Here, outer peripheral face 30a is suitable with cutter holder side engagement face of the present invention, can either play a role, also can play a role as centering composition surface as setting angle setting composition surface.Namely, when the cutter holder 20 left-hand tools axle 4 of the present embodiment is installed, engage with the inner peripheral surface 12a of aforementioned rotating shaft 4 by making this outer peripheral face 30a, and the setting angle corresponding with rotating shaft 4 is set in a certain degree (but, in case of the present embodiment, as mentioned above, eventually through making described cardinal extremity face 22 seamlessly engage (being close to) with described top end face 10, the setting angle of cutter holder 20 is set as that precision is higher).In addition, the cutter holder 20 of the present embodiment engages with the inner peripheral surface 12a of aforementioned rotating shaft 4 by making this outer peripheral face 30a, make the position of the radial direction of center line S2 consistent with the center line S1 of rotating shaft 4 (or consistent substantially), thus eliminate the position deviation (or limiting within the limits prescribed) of the radial direction of these center lines S2 and S1.
In addition, because aforementioned cardinal extremity face 22 and the joint of top end face 10 are the joints in the plane rectangular with axis, so, the setting angle of cutter holder 20 can be set as suitable angle, but, can not the position deviation with axially rectangular radial direction be limited.To this, because the joint of this outer peripheral face 30a and inner peripheral surface 12a is the joint in barrel surface vertically, so, position deviation (bias) (or being limited to prescribed limit) in the radial direction of cutter holder 20 can also be eliminated especially.But, even if when there is mismachining tolerance (crooked, eccentric) in described screwed hole 11, in order to make described cardinal extremity face 22 and top end face 10 be close to effectively, this outer peripheral face 30a and the chimerism (chimeric) of inner peripheral surface 12a preferably produce the movable fit or close with it lax chimeric in gap slightly between composition surface.
In addition, the material of cutter holder 20 can adopt various material.But material and the material in the cutter holder side engagement face (comprising the part of outer peripheral face 30a) forming cutter holder 20 on the rotation shaft side composition surface (at least comprise top end face 10, preferably also comprise the part of inner peripheral surface 12a) of formation rotating shaft 4 are set so that the material of the various materials that hyperacoustic spread speed is different.Such as, under the rotation shaft side composition surface of rotating shaft 4 is stainless situation, the cutter holder side engagement face of cutter holder 20 is made up of such as beryllium copper.
In addition, in this case, it is overall that non-essential beryllium copper forms cutter holder 20, such as, except the part (such as spanner holding section 27, cutter fixed part 21 etc.) of the base end side comprising cutter holder side engagement face also can be formed with such as stainless steel.
In addition, as the concrete material that hyperacoustic spread speed is different, it is not limited to this combination of beryllium copper of stainless steel and correspondence.Such as, the material substitution beryllium copper with the character identical with beryllium copper can also be adopted.
The present embodiment described above has action effect as described below.
That is, the cutter holder 20 of the present embodiment is by making integral-rotation, the installation shaft 23 of this cutter holder 20 is screwed into the threaded hole 11 that formed at the top end face of the rotating shaft 4 of main shaft device 1 and tightens, thereby, it is possible to be easily mounted to described rotating shaft 4 and be fixed.In addition, by making overall reverse rotation, this installation shaft 23 is taken out, thereby, it is possible to easily dismantle from described screwed hole 11.That is, cutter holder 20 easily can load and unload by screwing in.
And, as shown in Fig. 6 (a), even if described screwed hole 11 tilts relative to the center line S1 of described rotating shaft 4, because this inclination can be absorbed by the elastic deformation of described installation shaft 23, so by described installation shaft 23 is fully screwed in described screwed hole 11, the cardinal extremity face 22 of this cutter holder 20 and the state (or close to the state be close to) of the whole seamless combination outwardly (that is, being close to) of top end face 10 of described rotating shaft 4 can be realized.Here, Fig. 6 (a) and the middle center line representing the screwed hole 11 of inclination with symbol S3 of Fig. 7 (b) described later.
In addition, Fig. 7 (a) represents the comparative example being used for being described the action effect that the elastic deformation by above-mentioned installation shaft 23 produces.In this comparative example, installation shaft 23 is not formed gap 29, installation shaft 23 produces elastic deformation hardly when screwing in screwed hole 11.But, it is more difficult for will improving precision compared with the processing with the hole of the processing in the hole of the threaded portion as screwed hole 11 and the single of unthreaded hole, inner peripheral surface, and easily produces larger error (deviation of angle, the position deviation of radius strategy).
In addition, when this error occurs in the structure of the comparative example of Fig. 7 (a), as Fig. 7 (b) emphasize to illustrate, the center line S2 of cutter fixed part 21, cutter 50 towards consistent with the center line S3 of screwed hole 11, the unfavorable condition (bias) that departs from relative to center line S1 of the position of radial direction of can occur to tilt relative to the center line S1 of described rotating shaft 4 larger unfavorable condition (i.e. the deviation of setting angle), center line S2.There is the deviation of this setting angle, eccentric time, there is the deflection corresponding with these deviations, bias in the top of carrying out the cutter 50 of ultrasonic wave processing, is difficult to carry out high-precision processing.Especially, as shown in Fig. 7 (b), the deviation of setting angle is presented as larger position deviation on the top of the cutter 50 carrying out processing.Moreover, due to above-mentioned inclination (deviation of setting angle), as shown in Fig. 7 (b), between the cardinal extremity face 22 and the top end face 10 of described rotating shaft 4 of cutter holder 20, produce larger gap, this gap may be caused cannot abundant this fatal unfavorable condition of propagate ultrasound waves.
But the installation shaft 23 of the cutter holder 20 of the present embodiment is the structure (in this case, for having the segmentation structure in gap 29) that fully can produce elastic deformation when screwing in screwed hole 11.Therefore, as mentioned above, even if screwed hole 11 tilts, also installation shaft 23 fully can be screwed in screwed hole 11, thereby, it is possible to realize as shown in Fig. 6 (a), as described in cardinal extremity face 22 and as described in top end face 10 on the whole surface seamless combination be close to state (or being close to the close state of state with this).
Therefore, by the above-mentioned joint suitably of described cardinal extremity face 22 with described top end face 10, as long as according to the precision of regulation by described cardinal extremity face 22 and described top end face 10 towards being set as and axially rectangular direction, the center line S2 of the cutter fixed part 21 making this cutter holder tip side and the cutter 50 being fixed on this cutter fixed part 21 towards consistent with the center line S1 of described rotating shaft 4, even if then described threaded hole 11 (center line S3) is tilted relative to the center line S1 of described rotating shaft 4, also the inclination (being at least excessive inclination) relative to described rotating shaft 4 can not be there is in cutter holder 20 and cutter 50.Therefore, it is possible to guarantee the easily assembling of cutter holder 20, and be difficult to produce cutter holder 20 or cutter 50 deviation at least setting angle of described rotating shaft 4.
In addition, in the present embodiment, be also formed with centering composition surface (outer peripheral face 30a and inner peripheral surface 12a), this centering composition surface, when installing cutter holder 20, is bonded with each other so that suitably set the installation site of the radial direction of cutter holder 20.Therefore, depart from even if position occurs screwed hole 11 diametrically, under the state that cutter holder 20 is arranged on rotating shaft 4, the certralizing ability utilizing the elastic deformation of installation shaft 23 and produced by the joint on described centering composition surface, and the state (state that core is consistent) that the center line S1 presenting such as rotating shaft 4 is consistent with the center line S2 of cutter holder 20, cutter 50.Therefore, cutter holder 20, cutter 50 is also not easily produced for the deviation (bias) in the radial direction of the installation site of rotating shaft 4.
In addition, in the present embodiment, rotating shaft 4 utilizes adding the portion of shaking and carrying out ultrasonic wave vibration of ultrasonic main shaft main body 2, the vibration of this ultrasonic wave utilizes described top end face 10 and being close to of described cardinal extremity face 22 propagates into cutter 50 effectively, therefore, it is possible to realize that can carry out so-called ultrasonic wave processing, that reliability is higher ultrasonic main shaft device.
In addition, according to the present embodiment, because have above-mentioned cutter holder 20, the easily assembling of cutter holder 20 can be guaranteed, not easily produce cutter holder 20, cutter 50 for deviation, the bias of the setting angle of rotating shaft 4, the lower degradation unfavorable condition of the machining accuracy caused by this deviation can be prevented.
In addition, according to the present embodiment, also tool has the following advantages: utilize and extend ground in the axial direction from the top end face of described installation shaft 23, process this easy operation to gap 29, easily and at an easy rate can realize the structure of the produced elastic deformation of installation shaft 23.
Such as, as the mode except there is gap, can expect in theory: by forming the root portion of installation shaft 23 by rubber elastomeric material, forming the part of the threaded portion of installation shaft 23 by stainless steel and other metal materials, form the structure that can produce elastic deformation.But in this case, the connecting structure of elastomeric material and metal material is comparatively complicated, the making of cutter holder is difficult and cost is higher, and the possibility that the part of installation shaft 23 and screwed hole 11 maximizes in the axial direction is higher.Correspondingly, if the mode of the installation shaft of the present embodiment 23, as long as then process gap on common thread spindle, making is simple and cheap, and can not cause maximizing.
In addition, in the present embodiment, because set the material of the base end part of cutter holder 20 as mentioned above, crimp so between the top end face 10 and the cardinal extremity face 22 of cutter holder 20 of rotating shaft 4 (or also between the outer peripheral face 30a and the inner peripheral surface 12a of rotating shaft 4 of cutter holder 20) can be avoided to produce.
In addition, the present invention is not restricted to the described embodiments, and can also carry out various distortion, application.
Such as, be the thinner taper seat (cone shape surface) in top centered by center line S2 by making the outer peripheral face 30a of the cutter holder 20 of embodiment 1, and correspondingly, the inner peripheral surface 12a of rotating shaft 4 is made to be taper seat centered by center line S1, thus, the conical surface (composition surface be made up of relative to the face that center line S1, S2 tilt cross sectional shape) also played a role as centering composition surface can be formed.Namely, such as shown in Fig. 6 (b), can also be as under type: around the intake section of the screwed hole 11 of rotating shaft 4 and around the root portion of the installation shaft 23 of cutter holder 20, be formed and screw in the process of screwed hole 11 to the conical surface 41,42 that the direction of reducing composition surface spacing gradually tilts in installation shaft 23.Here, the conical surface 41 is using the inner peripheral surface 12a of the rotating shaft 4 of embodiment 1 as taper seat, and the conical surface 42 is using the outer peripheral face 30a of the cutter holder 20 of embodiment 1 as taper seat.
If have the structure of this taper seat, these taper seats also play a role as centering composition surface, even if screwed hole 11 produces position deviation relative to the center line S1 of rotating shaft 4, under the state that cutter holder 20 is arranged on rotating shaft 4, the effect of the centering utilizing the elastic deformation of installation shaft 23 and produced by the joint of the conical surface, thus the state that the center line S1 also presenting such as rotating shaft 4 is consistent substantially with the center line S2 of cutter holder 20, cutter 50 (state that core is consistent).Therefore, cutter holder 20, cutter 50 is also not easily produced for the deviation (bias) in the radial direction of the installation site of rotating shaft 4.And, in this case, because be the conical surface (face relative to axially tilting), so in the process of installation shaft 23 precession screwed hole, distance between initial composition surface is comparatively large, and the distance then between composition surface reduces gradually, therefore, also have and can engage sleekly, and then the effect of installation exercise (installation shaft 23 screws in the operation of screwed hole 11) of cutter holder 20 can be implemented sleekly.
In addition, when the conical surface 41,42 had as shown in Fig. 6 (b) relative to the composition surface axially tilted, without the need to the composition surface rectangular with axis as cardinal extremity face 22 and top end face 10.Its reason is: even if only have the such as conical surface 41,42, by being configured to the structure making these conical surfaces 41,42 necessarily be close to, also can set the whole setting angle of cutter holder 20, radial position and axial location.The structure that the propagation that can also be configured to ultrasonic wave vibration is also only carried out at the conical surface.When for this structure, this conical surface plays a role as setting angle setting composition surface, centering composition surface and ultrasonic propagation composition surface.
In addition, about the mode utilizing the conical surface propagate ultrasound waves shown in Fig. 6 (b) to vibrate, the material of the material forming the rotation shaft side of this conical surface and the cutter holder side that forms this conical surface preferably sets the material of the various materials making hyperacoustic spread speed different.If set material like this, can also prevent from producing crimping on this conical surface.
In addition, the present invention (being at least main inventive) can also be applicable to not make rotating shaft carry out the main shaft device of ultrasonic wave vibration certainly.In addition, the mode that the quantity in the gap of installation shaft, direction are also not limited to embodiment one is formed at.
Claims (5)
1. a cutter holder, be installed on the screwed hole for mounting cutter, the feature of described cutter holder is, the cutter fixed part that cutter is fixed is provided with in the tip side of axis, the base end side contrary with the tip side of axis be formed to axial outstanding installation shaft and be positioned at this installation shaft root around and the cutter holder side engagement face that can engage with the composition surface of the entrance being formed as described screwed hole, the periphery of described installation shaft is formed with the threaded portion that described installation shaft can be tightened to described screwed hole, described installation shaft is the structure of elastically deformable
The segmentation that being configured to of described elastically deformable has from the top end face of described installation shaft to axially extended gap constructs, and described gap is through in the radial direction of described installation shaft.
2. a main shaft device, is characterized in that, has the rotating shaft that this cutter holder can be installed in cutter holder according to claim 1 and top,
The top of described rotating shaft is formed with the screwed hole that can screw in described installation shaft, described cutter holder is installed to described rotating shaft by making described installation shaft screw in described screwed hole, around the entrance of the described screwed hole of described rotating shaft, be formed through and make described installation shaft screw in described screwed hole and the rotation shaft side composition surface engaged with described cutter holder side engagement face.
3. main shaft device according to claim 2, it is characterized in that, as described cutter holder side engagement face and described rotation shaft side composition surface, be formed as the face of the effect with the centering composition surface be bonded with each other respectively, suitably to set the installation site of the radial direction of described cutter holder.
4. the main shaft device according to Claims 2 or 3, it is characterized in that, as described cutter holder side engagement face and described rotation shaft side composition surface, be formed as the face of the effect on the ultrasonic propagation composition surface had for propagate ultrasound waves, this main shaft device have make described rotating shaft carry out ultrasonic wave vibration add the portion of shaking.
5. main shaft device according to claim 4, is characterized in that, at least about described ultrasonic propagation composition surface, the material forming described cutter holder side engagement face is different on ultrasonic propagation velocity from the material forming described rotation shaft side composition surface.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-157462 | 2011-07-19 | ||
| JP2011157462 | 2011-07-19 | ||
| JP2011168210A JP5633936B2 (en) | 2011-07-19 | 2011-08-01 | Tool holder and spindle device |
| JP2011-168210 | 2011-08-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102886533A CN102886533A (en) | 2013-01-23 |
| CN102886533B true CN102886533B (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110421132.8A Expired - Fee Related CN102886533B (en) | 2011-07-19 | 2011-12-15 | Cutter holder and main shaft device |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101491709B1 (en) |
| CN (1) | CN102886533B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909438B (en) * | 2014-03-03 | 2016-03-30 | 湖州精圆数控设备有限公司 | Numerically controlled machine tool swivel joint |
| CN104439298B (en) * | 2014-11-12 | 2017-02-15 | 广州市昊志机电股份有限公司 | Improved electric spindle |
| CN107866585A (en) * | 2016-09-26 | 2018-04-03 | 向宝土贡 | The miniature type of chip breaking chuck II of mechanical-vibration type aperture knife tool |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2477332Y (en) * | 2001-02-21 | 2002-02-20 | 北京科声超声波技术研究所 | Boring and picking device for supersonic magnetic material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3822506B2 (en) * | 2002-02-28 | 2006-09-20 | 日立ツール株式会社 | Tool holder, cutting edge member and cutting tool |
| JP5056019B2 (en) * | 2006-01-20 | 2012-10-24 | 日立ツール株式会社 | Blade replacement type cutting tool |
| JP2008238390A (en) * | 2007-03-23 | 2008-10-09 | Kazumasa Onishi | Ultrasonic tool holder |
-
2011
- 2011-10-06 KR KR20110101545A patent/KR101491709B1/en not_active IP Right Cessation
- 2011-12-15 CN CN201110421132.8A patent/CN102886533B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2477332Y (en) * | 2001-02-21 | 2002-02-20 | 北京科声超声波技术研究所 | Boring and picking device for supersonic magnetic material |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130010816A (en) | 2013-01-29 |
| CN102886533A (en) | 2013-01-23 |
| KR101491709B1 (en) | 2015-02-09 |
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