CN100478105C - Clamping mechanism for cutting insert, and cutting insert - Google Patents

Abstract

There is disclosed a clamping mechanism for a cutting insert that clamps the cutting insert by inserting the cutting insert into an insert mounting seat. The insert mounting seat is formed in a tip of a holder having a pair of contacting surfaces facing each other, and the cutting insert has a pair of contact surfaces to come in contact with the pair of contacting surfaces, respectively. The tip of the holder is provided with a pair of jaws that is formed with the pair of contacting surfaces, respectively, and that can be elastically deformed relatively in a direction that the contacting surfaces contact the contact surfaces, and a clamping means that elastically deforms the pair of jaws to bring relatively the pair of contacting surfaces close to each other and to separate them relatively from each other.

Description

The clamp mechanism of cutting insert and cutting insert

Technical field

For example the present invention relates in edge cutter (insert) the loading and unloading type instrument that is being used in the slotting (Ditch goes into れ) that is cut part or cutting (prominent つ cuts り), be used for cutting insert is clamped and can be installed on with loading and unloading the clamp mechanism of cutting insert of edge cutter mount pad of retainer and the cutting insert that clamps by this clamp mechanism.

Background technology

Clamp mechanism as such cutting insert that is used in slotting or cutting, know the clamp mechanism of following cutting insert: on the leading section of retainer, can be formed with to strain a pair of jaw parts in the front upper shed, part between them makes to become edge cutter mount pad, cutting insert be inserted in this edge cutter mount pad and with two jaw portions sandwich, with this make that the mutual opposed a pair of bearing surface of these jaw portions is connected to cutting insert respectively a pair of by on the bearing surface and push, clamp.And, usually, thereby in order to make above-mentioned jaw portion strain clamp cutting insert, for example as described in the patent documentation 1, adopted following mechanism: by will being screwed in the opposing party's jaw portion, thereby make this side's jaw portion approaching towards the opposing party's jaw portion deflection through the clamping screw element screw thread in a side the jaw portion.Again, the following fact has also been proposed: when inserting cutting insert, expand with this special-purpose operation instrument of key by groove in patent documentation 2, make a pair of jaw parts strain, thereby expand the interval between above-mentioned a pair of bearing surface, insert after the cutting insert, this key is extracted, also be screwed into the clamping screw element then, cutting insert is securely clamped by screw thread.

No. 3188790 communique of patent documentation 1 special permission

No. 3063685 communique of patent documentation 2 registration utility models

But, in order before clamping, cutting insert to be inserted in the edge cutter mount pad, a pair of big a little by the interval between bearing surface than cutting insert to be done to become in the interval between a pair of bearing surface, thereby also must have the gap in vain though between is very little.But, as as described in the patent documentation 1, only only make jaw portion strain by clamping screw element, thereby in the clamp mechanism that cutting insert is fastening, in jaw portion not under the state of strain, such gap is necessary, if screw thread is screwed into the clamping screw element from here, cutting insert is fastening, then must jaw portion be out of shape significantly with this gap, the screw thread that needs bigger power to clamp screw element is screwed into, and in the jaw portion of such strain significantly, the counter-force that produces because a side's of this strain jaw portion will turn back to original undeformed state acts on the side that cutting insert is fastening and goes up in the opposite direction, so also there is the clamping force of causing to reduce this drawback.

On the other hand, according to patent documentation 2 described clamp mechanism, because after expanding jaw portion for the time being with key, insert cutting insert by above-mentioned groove expansion, so can make under the state that extract key after the insertion on above-mentioned bearing surface is connected to by bearing surface, and then be screwed into the clamping screw element by screw thread, just cutting insert can be pushed clamping strongly.But, in these patent documentation 2 described clamp mechanism, because except the operation of the spanner in the time will clamping the screw element screw thread and be screwed into etc. with the instrument, this the special-purpose operation of above-mentioned groove expansion key also is necessary with instrument when cutting insert is inserted, so these operations are more miscellaneous with the management of instrument, and because must separately use multiple operation instrument, so can not avoid clamping also more miscellaneous this situation of operation self.

Summary of the invention

The present invention makes under such background, purpose is to provide a kind of clamp mechanism of cutting insert and the cutting insert that clamps by this clamp mechanism, the clamp mechanism of aforementioned cutting insert sandwiches cutting insert and clamp by a pair of jaw parts as described above; Can obtain to keep reliably the sufficient clamping force of cutting insert, and not force the operator to carry out unnecessary labour or miscellaneous operation with the management of instrument and clamp operation.

Thereby reach such purpose in order to address the above problem, the clamp mechanism of cutting insert of the present invention, in having mutual opposed a pair of bearing surface and being formed at edge cutter mount pad on the leading section of retainer, insert and sandwich to have and be connected to a pair of on the above-mentioned a pair of bearing surface respectively by the cutting insert of bearing surface, thereby clamp, the leading section of above-mentioned retainer is provided with: a pair of jaw parts, respectively be formed with 1 in the above-mentioned a pair of bearing surface, can with above-mentioned by the butt direction of bearing surface butt on strain relatively; Clamp mechanism, make this pair of jaw parts strain, thereby make above-mentioned a pair of bearing surface on above-mentioned butt direction relatively near or relatively leave with respect to this butt direction, above-mentioned clamp mechanism has for clamping screw element: run through the leading section of above-mentioned retainer and be threaded in outer screw section in the jaw portion of a side in the above-mentioned pair of jaw parts towards above-mentioned butt direction; With with the head in the jaw portion that can be contained in the opposing party towards the leaving of above-mentioned butt direction, near the mode of both sides butt, in above-mentioned the opposing party's jaw portion, be formed with accepting hole, and in the peristome of this accepting hole and the opposite side of a jaw portion above-mentioned side, lid is installed, described accepting hole has: minor diameter part, and little and above-mentioned outer screw section can insert wherein with relaxing than above-mentioned head towards an above-mentioned side's jaw portion one side opening, diameter; Large-diameter portion is in an opposite side upper shed with an above-mentioned side's jaw portion and can accommodate above-mentioned head.

In the clamp mechanism that constitutes like this, because a pair of jaw parts is by above-mentioned clamp mechanism, in a pair of bearing surface approaching side in above-mentioned butt direction, with with its side strain of leaving with respect to this butt direction on the contrary, so by being used to operate the single operation instrument of this clamp mechanism, the compartment of terrain that just can have in vain between above-mentioned a pair of bearing surface is loaded and unloaded on cutting insert in the edge cutter mount pad, and the cutting insert that above-mentioned interval will be inserted in the edge cutter mount pad with narrowing down like this clamps, and does not exist operation with the management of instrument or separately use miscellaneous property of several work usefulness instrument.And, when the cutting insert in will being inserted in this edge cutter mount pad clamps, because can a pair of jaw parts not strain state or under the state of strain on the direction that a pair of bearing surface leaves, be connected on the cutting insert, make this pair of jaw parts approaching on above-mentioned butt direction from this state, thereby clamp this cutting insert, so can suppress the counter-force that jaw portion will turn back to original state, perhaps act on the direction that clamps cutting insert, thereby can clamp cutting insert reliably by sufficient clamping force with this counter-force.

If the above-mentioned outer screw section screw thread of such clamping screw element is screwed in a side jaw portion, be connected in the opposing party's the jaw portion with making the approaching side of above-mentioned head a pair of bearing surface in above-mentioned butt direction, the side's that then above-mentioned outer screw section spun head, the mode relative resilient distortion that is introduced into jaw portion with respect to the opposing party of this head institute butt, if the mode of extracting from a side jaw portion with this outer screw section is rotated the clamping screw element on the contrary, be connected in the opposing party's the jaw portion to the then above-mentioned head side that a pair of bearing surface leaves in above-mentioned butt direction, one side's jaw portion, with with respect to the opposing party's jaw portion by on the mode strain that pushes away, thereby leave mutually.

Again, for the head that will clamp screw element like this can towards the leaving of above-mentioned butt direction, near the both sides butt be contained in the opposing party's the jaw portion, by in above-mentioned the opposing party's jaw portion, being formed with accepting hole, and in the peristome of this accepting hole and the opposite side of a jaw portion above-mentioned side, lid is installed, described accepting hole has: minor diameter part, and little and above-mentioned outer screw section can insert wherein with relaxing than above-mentioned head towards an above-mentioned side's jaw portion one side opening, diameter; Large-diameter portion, in an opposite side upper shed and can accommodate above-mentioned head with an above-mentioned side's jaw portion, just can make the head that clamps screw element with this, be connected in the approaching side of a pair of bearing surface of above-mentioned butt direction on the end difference of the above-mentioned minor diameter part of accepting hole and large-diameter portion, on the other hand, on the contrary, a side of leaving at a pair of bearing surface is connected on the lid, thus can by this rotating operation that clamps screw element make a pair of jaw parts with and bearing surface leave, approaching.In addition, under this situation, connect screwed part in the threaded portion that is rotatably connected in the peristome that is formed on above-mentioned accepting hole and the opposite side of a jaw portion above-mentioned side by above-mentioned lid being made become spiral, the hand of spiral of this threaded portion is made to become the opposite direction of the hand of spiral with the outer screw section of above-mentioned clamping screw element, thereby even on the side that a pair of bearing surface leaves, rotate the clamping screw element as described above it is connected on the above-mentioned lid, also can prevents lid rotation together by the rotating operation that clamps screw element, thereby break away from such situation from above-mentioned threaded portion.

And then, under this situation, by with the above-mentioned minor diameter part of above-mentioned accepting hole and the part between the large-diameter portion, at least one side in the part of an above-mentioned side's jaw portion one side with above-mentioned head, with along with towards an above-mentioned side's jaw portion one side and the mode that diameter diminishes gradually form, the center line of the accepting hole of the screwed hole center line of the side's that above-mentioned outer screw section spun jaw portion and the opposing party's jaw portion, even owing to the strain of this jaw portion produces inclination, also can the clamping screw element be fascinated with this, thereby prevent from clamping screw element, to produce crooked, and, clamp stability under the state that the clamping screw element fascinates like this so can keep reliably because the mode that also can contact with line at least makes head and accepting hole butt.In addition, for like this with between the big minor diameter part of accepting hole or the diameter that clamps the screw element head do to become less, for example in the minor diameter part and the part between the large-diameter portion of accepting hole, concave spherical surface shape or recessed conical surface-shaped that work becomes towards an above-mentioned side's jaw portion side depression get final product, in clamping the head of screw element, will form protruding dome shape towards the part of a side jaw portion side or the dome conical surface shape gets final product.Again, for example do to become under the situation of dome conical surface shape in a side's that will clamp the screw element head like this jaw portion one side, the part between the big minor diameter part of accepting hole makes to become the protruding song of the inside all sides in cross section along the center line of this accepting hole, along with towards a side jaw portion one side and the curved surface shape of undergauge also can.

And then, under with the situation of clamping screw element as described above as clamp mechanism, in the above-mentioned pair of jaw parts, an above-mentioned side's jaw portion is positioned at the front face side of the cutting blade of above-mentioned cutting insert, the thickness of its above-mentioned butt direction is thinner than above-mentioned the opposing party's jaw portion, thus, in the bigger jaw portion of the opposing party's wall thickness, just can guarantee to accommodate the sufficient space of the head that clamps screw element.On the other hand, at the outer screw section that will clamp screw element when screw thread is screwed into as described above, the mode that approaches the bigger the opposing party's of wall thickness jaw portion one side with the less side's of wall thickness jaw portion makes its strain, but in this side's jaw portion, accommodate the accepting hole of the head in big footpath compares with formation, approach to inlay on the position of cutter mount pad as far as possible because the screwed hole of the outer screw section that can clamp screw element with spinning is formed at, so can greatly suppress to inlay the inclination that the strain because of a side jaw portion of cutter mount pad periphery causes, thus with its bearing surface reliably butt be clamped on the cutting insert.By making this wall thickness,, also can promote its discharge swimmingly with regard to not hindering the discharge of the smear metal that generates by this cutting blade than the front face side that a thin side's jaw portion is positioned at cutting blade again.

And then, leading section by above-mentioned retainer is provided with controlling organization, its distance of leaving to the above-mentioned a pair of bearing surface that utilizes above-mentioned clamp mechanism and leave is controlled, thereby for example just can prevent from above-mentioned clamping screw element is exceedingly rotated above-mentioned a pair of bearing surface unnecessarily too away from this situation.Thereby, like this, can prevent following situation: the interval of above-mentioned a pair of bearing surface is exceedingly open significantly by the operation of above-mentioned clamping screw element, thereby the operational ton that clamps screw element when the loading and unloading of cutting insert becomes too much, perhaps under the state of the bigger expansion in the interval of a pair of bearing surface, place retainer like this, a for example above-mentioned pair of jaw parts plastic deformation of relative resilient distortion, thus forfeiture keeps the clamping function of above-mentioned cutting insert.That is,, just can insert and an above-mentioned pair of jaw parts does not produce in the scope of plastic deformation, (separating) distance of leaving of above-mentioned a pair of bearing surface is controlled at cutting insert by controlling organization is set like this.

On the other hand, in clamp mechanism of the present invention, bearing surface by making a side in the above-mentioned a pair of bearing surface with its front part at least along with tilting towards the mode of the opposing party's bearing surface side towards front, again, in the cutting insert that clamps by such clamp mechanism, be connected to being tilted in the following manner by bearing surface an of side of this cutting insert on an above-mentioned side's the bearing surface: its front part is along with towards front at least, with the inclination of an above-mentioned side's bearing surface as one man towards the opposing party by the bearing surface side, just can by the bearing surface of these inclinations with prevented the front of cutting insert from retainer this situation that comes off by the butt of bearing surface.And, even because under the situation that the interval between a pair of bearing surface makes in the mode that narrows down towards front ground tilting by the bearing surface that makes a side like this, clamp mechanism according to above-mentioned formation, also can easily the interval between a pair of bearing surface be expanded and open, so can carry out the insertion of cutting insert in edge cutter mount pad more smoothly by one pair of jaw parts being left with above-mentioned clamp mechanism.

Description of drawings

Fig. 1 be used clamp mechanism of the present invention the 1st embodiment edge cutter loading and unloading type instrument retainer 1, with the exploded perspective view of the cutting insert 11 of one embodiment of the present invention.

Fig. 2 is the side view of edge cutter loading and unloading type instrument as shown in Figure 1.

Fig. 3 is the vertical view of edge cutter loading and unloading type instrument as shown in Figure 1.

Fig. 4 is the front view of edge cutter loading and unloading type instrument as shown in Figure 1.

Fig. 5 is the YY cutaway view the 1st embodiment, among Fig. 3 of expression clamp mechanism of the present invention.

Fig. 6 is the YY cutaway view the 2nd embodiment, among Fig. 3 of expression clamp mechanism of the present invention.

Fig. 7 is the ZZ cutaway view the 3rd embodiment, among Fig. 3 of expression clamp mechanism of the present invention.

Fig. 8 is the ZZ cutaway view the 4th embodiment, among Fig. 3 of expression clamp mechanism of the present invention.

Symbol description:

1 retainer

3 heads

4 edge cutter mount pads

4A, the 4B bearing surface

11 cutting inserts

12 blade parts

14A, 14B is by bearing surface

21 clamp mechanism

22 clamp screw element

22A clamps the outer screw section of screw element 22

22B clamps the head of screw element 22

The protruding dome shape of 22D portion

23 installing holes

24 screwed holes

25 accepting holes

The minor diameter part of 25A accepting hole 25

The large-diameter portion of 25B accepting hole 25

The tabular surface of 25C accepting hole 25

The recessed conical surface-shaped of 25F portion

26 lids

30 controlling organizations

31 leave the control screw element

31A leaves the outer screw section of control screw element 31

31B leaves the head of control screw element 31

32 control screw element installing holes

32A controls screwed hole

The accepting hole of 32B control screw element installing hole 32

The minor diameter part of 32D accepting hole 32B

The large-diameter portion of 32E accepting hole 32B

The tabular surface of 32F control screw element installing hole 32

O clamps the center line of screw element 22

O2 leaves the center line of control screw element 31

The specific embodiment

Fig. 1 to Fig. 5 is the figure of edge cutter loading and unloading type instrument that the 1st embodiment of clamp mechanism of the present invention has been used in expression.In this edge cutter loading and unloading type instrument, retainer (tool rest) 1 formed by steel etc., such as shown in Figures 1 to 4, the shank 2 that has flat column in rear end side (in Fig. 2, Fig. 3, being the right side), and leading section (in Fig. 2, Fig. 3 for left part) makes to become head 3, and it is overlooked as shown in Figure 2 from 1 side 2A of this shank 2 and protrudes in the side a little and top is outstanding in the mode from the upper surface 2B protuberance of shank 2 as shown in Figure 2 from the side-looking of this side 2A side.

Mode with the elongated surfaces of 2 the above-mentioned upper surface 2A from its front along shank on this head 3 is formed with slit 3A, than this slit 3A 3B of maxilla portion of upside (the jaw portion of the side in the present embodiment) more, the thickness of the direction of itself and above-mentioned elongated surfaces quadrature as shown in Figure 2, the 3C of lower jaw portion (the jaw portion of the opposing party in the present embodiment) that does to become than downside is thin.Again, the sectional area that the sectional area of the coupling part 3D that is connected with shank 2 sides that delimit by above-mentioned slit 3A also does to become the coupling part that is connected with shank 2 than the 3C of lower jaw portion is little, the 3B of maxilla portion can with this coupling part 3D as fulcrum and towards the mode strain of the 3C of lower jaw portion side deflection.

And, constitute up and down the edge cutter mount pad 4 of the groove shape of wide cut more than this slit 3A, in the fluting portion with the above-mentioned side 2A side that is formed at this slit 3A in the front end upper shed of head 3 and the mode that extends to rear end side, on the 3B of the upper jaw and the lower jaw portion of this edge cutter mount pad 4,3C side, be formed with a pair of bearing surface 4 A, 4B in mutual opposed mode up and down.Thereby, in the present embodiment, with this a pair of bearing surface 4A, 4B the vertical direction (being above-below direction in Fig. 4, Fig. 5) of opposed above-mentioned elongated surfaces be its butt direction, a pair of jaw parts 3B, 3C can be on this butt direction strain relatively.

Wherein, the above-mentioned lower jaw 3C of portion with its front along the above-mentioned side 2A of shank 2 and the mode that on front, extends to the square plate shape form, the bearing surface of this 3C of lower jaw portion side (bearing surface of the opposing party in the present embodiment) 4B forms in the mode that the length direction from the front end edge retainer 1 of the 3C of this lower jaw portion extends to the stage casing of above-mentioned slit 3A.On the other hand, the leading section of the above-mentioned side 2A side of the 3B of maxilla portion is done to become in the mode of the above-mentioned square plate that become along the 3C of lower jaw portion and is had along with towards front and tabular towards the triangle of the hypotenuse of below, but this front end more retreats than the front end of the 3C of lower jaw portion, the bearing surface of this 3B of maxilla portion side (bearing surface of the side in the present embodiment) 4A, from than the more close front of length direction central portion of the bearing surface 4B of the 3C of lower jaw portion, extend and be set to than the rear end of bearing surface 4B front a little.In addition, on the rear end of this edge cutter mount pad 4, be formed on the 3C of lower jaw portion towards the 3rd bearing surface 4C of front, slit 3A crosses the 3rd bearing surface 4C and extends in front of the rear end that is set to head 3.

Again, above-mentioned a pair of bearing surface 4A, 4B, with the cross section of above-mentioned length direction quadrature in, form the V word shape of mutual protrusion, described butt direction side towards its butt direction side respectively, be meant on a side the bearing surface 4A on the side (being downside among Fig. 4) of the opposing party's bearing surface 4B, bearing surface 4B, being a side (being upside among Fig. 4) towards a side bearing surface 4A the opposing party.And then, these bearing surfaces 4A, 4B, also with the cross section of above-mentioned length direction quadrature in, form with respect to the mode that becomes symmetric shape at the upwardly extending common plane P in above-mentioned butt side with the central portion of the width (left and right directions among Fig. 4) of this bearing surface 4A, 4B.

And then, among these bearing surfaces 4A, the 4B, the bearing surface 4B that is formed at the opposing party on the 3C of lower jaw portion spreads all over above-mentioned length direction endlong along the straight extension of this length direction, do to become certain with the cross section of this length direction quadrature, on the other hand, be formed at the bearing surface 4A of the side on the 3B of maxilla portion, at the 3B of this maxilla portion not under the state of strain, with its fore-end along with tilting with certain inclination angle towards the mode of (close) above-mentioned the opposing party's bearing surface 4B side (being downside in Fig. 2) towards front.In addition, than the front of this inclination part rear end side more, at the 3B of maxilla portion also not under the state of strain, extremely short part via the length direction central portion of a side bearing surface 4A along the straight extension of above-mentioned length direction, with the certain inclination angle milder, along with towards rear end side and oblique towards the opposing party's bearing surface 4B inclination than above-mentioned inclination angle.

Be installed on this cutting insert 11 of the one embodiment of the present invention in such edge cutter mount pad 4, the hard material by superhard alloy etc. forms roughly flat column, does to become to have blade part 12, so-called dog bone type on the two ends of its length direction.Promptly, in these blade parts 12, its upper surface do to become along with become gradually towards each both end sides wide cut, overlook the roughly front 12A of isosceles trapezoid, and each front end face of blade part 12 (both ends of the surface of cutting insert 11) makes to become back 12B, in the crest line portion of intersecting of these fronts 12A and back 12B, be to be formed with cutting blade 13 in the arris portion of edge cutter both end sides of front 12A.

And then, on the part in the upper surface of this cutting insert 11 between the blade part 12 at two ends and the lower surface, be formed with a pair of on above-mentioned a pair of bearing surface 4A, the 4B that is connected to edge cutter mount pad 4 respectively by bearing surface 14A, 14B.At this, these are by among bearing surface 14A, the 14B, make to become recessed V word shape on bearing surface 4A, the 4B that can be sticked in its butt respectively with the cross section of the above-mentioned length direction quadrature of this cutting insert 11 in this cross section.In addition, the cutting insert 11 of present embodiment do to become about in its length direction central portion with this length direction plane orthogonal with this planar quadrature and the plane Q that will be extended by the mode of bearing surface 14A, 14B 2 five equilibriums on its width central portion and the shape of symmetry.

Again, wherein, being extended with length direction of lower face side along cutting insert 11 by bearing surface (the opposing party in the present embodiment by bearing surface) 14B, the mode that spreading all over its total length becomes a uniform section forms, with respect to this, upper surface side by bearing surface (side in the present embodiment by bearing surface) 14A, make in the mode of in the extremely short scope of its length direction central portion, extending abreast with the lower surface of cutting insert 11, and with from this central portion along with towards both end sides, the mode by bearing surface 14B side with the certain inclination angle that equates with an above-mentioned side's the inclination angle that bearing surface 4A was constituted towards the opposing party tilts, and becomes a uniform section respectively with the cross section of this incline direction quadrature.And then, be connected to the 3rd on above-mentioned the 3rd bearing surface 4C by bearing surface 14C when this cutting insert 11 being inserted the above-mentioned edge cutter mount pad 4 from front, the above-mentioned back 12B that is formed at than the blade part in the both ends of the surface of cutting insert 11 12 in the mode vertical with the above-mentioned length direction of cutting insert 11 more locates by the below.

And, on the above-mentioned head 3 of retainer 1 leading section, be formed with and make an above-mentioned pair of jaw parts 3B, 3C strain, approaching relatively on above-mentioned butt direction, and the clamp mechanism of leaving relatively with respect to this butt direction 21.But, in the present embodiment, as described above, become the 3B of maxilla portion of a side jaw portion, with respect to the 3C of lower jaw portion of the jaw portion that becomes the opposing party, the thinner thickness of above-mentioned butt direction, the 3B of this maxilla portion is with respect to the 3C of lower jaw portion and strain, leaves on above-mentioned butt direction, approaching.Again, under the undeformed state of the 3B of this maxilla portion, the interval of the butt direction between above-mentioned a pair of bearing surface 4A, 4B, equated by the interval between bearing surface 14A, 14B with cutting insert 11 a pair of or slightly littler than it, thereby under the state on the opposing party's who is connected to the 3C of lower jaw portion by bearing surface 1 4B of the opposing party of cutting insert 11 lower face side the bearing surface 4B, the front part of the inclination of the bearing surface 4A of the 3B of maxilla portion, be connected to closely cutting insert 11 upper surface side a side by on the sloping portion of bearing surface 14A front.

At this, the clamp mechanism 21 of present embodiment, as shown in Figure 5, work becomes the clamping screw element 22 towards the head 3 of above-mentioned butt direction ground 1 leading section from the below through retainer, this clamping screw element 22 have and cross above-mentioned slit 3A, be rotatably connected among the 3B of maxilla portion outer screw section 22A and than the more big footpath of this outer screw section 22A and be contained in head 22B among the 3C of lower jaw portion, on the end face of these outer screw sections 22A that clamps screw element 22 two ends and head 22B, be formed with the general operation that is sticked in spanner etc. respectively with the connecting hole 22C on the instrument.In addition, in the present embodiment, this head 22B, it is that the roughly heavy wall at center is discoideus that its profile constitutes center line O with outer screw section 22A.

With respect to this, on head 3, be formed with the installing hole 23 that this clamping screw element 22 is installed, this installing hole 23 comprises the screwed hole 24 of above-mentioned outer screw section 22A of the 3B of the maxilla portion side that spins and the accepting hole 25 that forms and accommodate the above-mentioned head 22B of the 3C of lower jaw portion side coaxially with this screwed hole 24, in the present embodiment, the center line of this installing hole 23, promptly be installed on the center line O of the above-mentioned outer screw section 22A of the clamping screw element 22 in this installing hole 23, the elongated surfaces of the upper surface 2B of the above-mentioned shank 2 that is extended with slit 3A is vertical.In addition, wherein, above-mentioned screwed hole 24 connects the 3B of maxilla portion from slit 3A, in upper surface (upper surface of the 3B of maxilla portion) the 3E upper shed of making to become the head parallel with above-mentioned elongated surfaces 3.

On the other hand, above-mentioned accepting hole 25, also the 3C of lower jaw portion is connected, 3 lower surface (lower surface of the 3C of lower jaw portion) 3F, comprises towards the below from this slit 3A side in slit 3A upper shed successively towards the 3B of maxilla portion side ground from the head: have than the above-mentioned head 22B path that clamps screw element 22 and than the minor diameter part 25A of the internal diameter in the big slightly footpath of outer screw section 22A with have than the big footpath of this minor diameter part 25A and can accommodate the large-diameter portion 25B of the internal diameter of the above-mentioned head 22B that clamps screw element 22.Thereby the outer screw section 22A that clamps screw element 22 does to become slightly with a gap, and pine inserts among the above-mentioned minor diameter part 25A.In addition, the circular tabular surface 25C vertical with above-mentioned center line O in the present embodiment, made to become in the coupling part of these minor diameter parts 25A and large-diameter portion 25B.

And then, in this large-diameter portion 25B on the peristome side of the above-mentioned lower surface 3F opposite with the 3B of maxilla portion, also be formed with successively towards below ground: the 25D of negative thread portion (threaded portion) that the internal diameter of ridge equates with the internal diameter of large-diameter portion 25B, with the 25E of spot-facing portion than the more big footpath of internal diameter of the paddy portion of the screw thread of the 25D of this negative thread portion.And, above-mentioned outer screw section 22A is being rotatably connected in the screwed hole 24, and head 22B is contained among the above-mentioned large-diameter portion 25B of accepting hole 25, thereby screw element 22 is installed in the installing hole 23, and then screw thread is screwed into outer screw section 22A, under head 22B is connected to state on the above-mentioned tabular surface 25C, at this large-diameter portion 25B on the peristome of lower surface 3F side, lid 26 is installed, its coaxial outer screw section 26A that is rotatably connected among the above-mentioned negative thread 25D of portion that forms, with when being screwed into this outer screw section 26A screw thread in the 25D of negative thread portion, be contained among the above-mentioned spot-facing 25E of portion butt, discoideus 26B than the more big footpath of outer screw section 26A.In addition, the hand of spiral of the screw thread of the 25D of negative thread portion of the outer screw section 26A of this lid 26 and above-mentioned accepting hole 25, do to become with the 3B of maxilla portion in above-mentioned screwed hole 24 and to clamp the hand of spiral of screw thread of outer screw section 22A of screw element 22 opposite.

Thereby, clamp the above-mentioned head 22B of screw element 22, by in the mode of advancing outer screw section 22A screw thread being screwed in screwed hole 24 as described above to the upper surface 3E of head 3 side, above-mentioned a pair of bearing surface 4A, 4B relatively are connected on the above-mentioned tabular surface 25C of accepting hole 25 at (in the present embodiment, a side bearing surface 4A is to the opposing party's a bearing surface 4B side) approaching side, its back side in above-mentioned butt direction.And, by further outer screw section 22A screw thread being screwed into from here, one pair of jaw parts 3B, 3C are just with relatively (in the present embodiment, one side's the 3B of jaw portion is to the opposing party's the 3C of jaw portion side) approaching mode strain, follow in this, this a pair of bearing surface 4A, 4B are also approaching, thereby it narrows down at interval.

Again, in contrast, if become flexible outer screw section 22A from screwed hole 24 in the mode that retreats with respect to upper surface 3E side, then clamp the head 22B of screw element 22, be formed with end face above-mentioned a pair of bearing surface 4A in above-mentioned butt direction of its connecting hole 22C, 4B relatively (in the present embodiment, one side's bearing surface 4A is with respect to the opposing party's bearing surface 4B side) side left, be connected on the above-mentioned lid 26, by further loosening from here outer screw section 22A (being screwed into) to the 3C of lower jaw portion side screw thread, in the present embodiment, the outer screw section 22A that head 22B is connected to the clamping screw element 22 that forms on the lid 26 on the 3C of jaw portion that is fixed on the opposing party just pushes away on the 3B of jaw portion with a side, a thereby pair of jaw parts 3B, 3C is with relatively (in the present embodiment, one side's the 3B of jaw portion is to a side opposite with the opposing party's the 3C of jaw portion) the mode strain left, thereby this a pair of bearing surface 4A, 4B also leaves, thereby it broadens at interval.

Promptly, clamp the above-mentioned head 22B of screw element 22 in the present embodiment, by being connected on the above-mentioned par 25C along a pair of bearing surface 4A of above-mentioned butt direction, the approaching side of 4B, be connected on the lid 26 by a side of leaving at a pair of bearing surface 4A, 4B again, can be contained in wherein in mode towards the accepting hole 25 of the 3C of jaw portion that leaves, is connected to the opposing party of this butt direction near both sides via this lid 26.In addition, as shown in Figure 5, under this head 22B is connected to state on the tabular surface 25C, in accepting hole 25, the above-mentioned end face of this head 22B and and the end face of the opposed lid 26 of this end face between gapped slightly.Again, the hand of spiral of the outer screw section 22A of the above-mentioned screwed hole 24 of installing hole 23 and the clamping screw element 22 that screws togather with it makes in such a way: 3 upper surface 3E observes from the head, when making the screw thread that clamps screw element 22 and general right-handed thread spare be screwed into operation similarly around the rotation of center line O clockwise direction, a pair of bearing surface 4A, thereby 4B is clamped near cutting insert 11, observe from upper surface 3E on the contrary, in the time will clamping screw element 22 and counterclockwise rotate, a pair of bearing surface 4A, 4B leaves, and cutting insert 11 can be inserted in edge cutter mount pad 4 and unload.

On the other hand, in the present embodiment, as Fig. 3 extremely as shown in Figure 4, the head 3 of retainer 1 leading section is provided with controlling organization 30, when making above-mentioned a pair of bearing surface 3B, 3C strain with clamp mechanism 21, the interval (leaving distance) of a pair of bearing surface 4A, the 4B that leave relatively on the butt direction is controlled.This controlling organization 30 is done to become leaving towards the head 3 of above-mentioned butt direction 1 leading section from the below through retainer and is controlled screw element 31, and being arranged at than clamp mechanism 21 is the another side side of opposition side by the side with edge cutter mount pad 4 sides more.

This leave control screw element 31 have cross above-mentioned slit 3A, be rotatably connected among the 3B of maxilla portion outer screw section 31A and than the big footpath of this outer screw section 31A and be contained in the head 31B among the 3C of lower jaw portion and constitute.Again, head 31B headward 3 below end face on be formed with the general operation that is sticked in spanner etc. with the connecting hole 31C on the instrument.In addition, in the present embodiment, it is that the roughly heavy wall at center is discoideus that its profile of this head 31B constitutes center line O2 with outer screw section 31A.

With respect to this, on head 3, be provided with the control screw element installing hole 32 that this leaves control screw element 31 be installed, this control screw element installing hole 32 comprise the 3B of the maxilla portion side that spins above-mentioned outer screw section 31A control screwed hole 32A and form and accommodate the accepting hole 32B of the above-mentioned head 31B of the 3C of lower jaw portion side coaxially with this control screwed hole 32A.This control screw element installing hole 32 is provided with in its center line O2 mode parallel with the center line O of the clamping screw element 22 of aforementioned clamped mechanism 21.In addition, control screwed hole 32A connects the 3B of maxilla portion from slit 3A, in the upper surface 3E of head 3 upper shed.

The accepting hole 32B of control screw element installing hole 32, the 3C of lower jaw portion is connected, 3 lower surface opening comprises towards the below successively from this slit 3A side on slit 3A from the head: have than the head 31B path that leaves control screw element 31 and than the minor diameter part 32D of the internal diameter in the big a little footpath of outer screw section 31A with have than the big footpath of this minor diameter part 32D and can accommodate the large-diameter portion 32B of the internal diameter of the head 31B that leaves control screw element 31.With this, leave among the outer screw section 31A pine intervention slightly with a gap minor diameter part 32D of control screw element 31.In addition, minor diameter part 32D makes to become the circular tabular surface 32F vertical with center line O2 with the coupling part of large-diameter portion 32E.

The controlling organization 30 of Gou Chenging is rotatably connected in the outer screw section 31A that leaves control screw element 31 among the control screwed hole 32A like this, is provided with in control screw element installing hole 32 and leaves control screw element 31.But, outer screw section 31A and by halves screw thread be screwed in control screwed hole 32A, leave control screw element 31, as shown in Figure 4, under the state that cutting insert 11 clamps by clamp mechanism 21, the mode that is not connected on the tabular surface 32F that controls screw element installing hole 32 with its head 31B is provided with predetermined gap between head 31B and tabular surface 32F.

In having the edge cutter loading and unloading type instrument of such clamp mechanism, be installed in the edge cutter mount pad 4 of retainer 1 for above-mentioned cutting insert 11 is clamped, at first from the head the peristome of the screwed hole 24 among the upper surface 3E of 3 the 3B of maxilla portion, the general operation of above-mentioned spanner etc. inserted and be sticked in instrument be formed on as among the above-mentioned connecting hole 22C on the outer screw section 22A end face in the clamping screw element 22 of clamp mechanism 21.And, if to clamp mode that screw element 22 moves back with respect to upper surface 3E rear flank, when upper surface 3E side is observed, to make and clamp screw element 22 and center on center line O and counterclockwise rotate as described above, the head 22B that then clamps screw element 22 is connected to after the lid 26, push to the 3B of jaw portion on the outer screw section 22A and make its strain, leave with this a pair of bearing surface 4A, 4B, thereby it broadens at interval.

At this moment, be accompanied by the 3B of maxilla portion by clamp mechanism 21 operation and strain, the head 31B that leaves control screw element 31 of controlling organization 30 moves in large-diameter portion 32B towards the tabular surface 32F side ground of control screw element installing hole 32.And, above-mentioned interval (being the interval of a side the front end of bearing surface 4A and the opposing party's bearing surface 4B in the present embodiment) expands to the size that cutting insert 11 can be inserted, and the head 31B that leaves control screw element 31 is connected on the tabular surface 32F, can not make with this to clamp screw element 22 and further be rotated counterclockwise, thereby not have the 3B of maxilla portion strain and make this situation of expanding at interval exceedingly.With this, the interval that is suitable for cutting insert 11 insertions is done to become in the interval of a pair of bearing surface 4A, 4B, make being slidably connected to by bearing surface 14B on the opposing party's the bearing surface 4B of the opposing party, from the front of retainer 1 cutting insert 11 is inserted in the edge cutter mount pad 4, makes the 3rd to be connected to above-mentioned the 3 the by bearing surface 14C and to connect on the face 4C.

Then, if from observing with above-mentioned opposite upper surface 3E side, the clockwise direction rotation clamps screw element 22, then the 3B of maxilla portion approaches the 3C of lower jaw portion side, thereby the interval between a pair of bearing surface 4A, 4B narrows down, the head that clamps screw element 22 partly be connected to away from, the front of a side bearing surface 4A from lid 26 cutting insert 11 a side by on the front of the bearing surface 14A part.And, if and then the continuation rotation clamps screw element 22, then head 22B just is connected on the above-mentioned tabular surface 25C of accepting hole 25, a side bearing surface 4A afterwards, accept screw thread towards the side of the bearing surface 4B that approaches the opposing party in the mode of the 3B of maxilla portion strain and be screwed into power, a pair ofly be pressed on a pair of bearing surface 4A, 4B with this, thereby cutting insert 11 is fastening, is fixedly clamped in edge cutter mount pad 4 by bearing surface 14A, 14B.

In addition, in the present embodiment, because an above-mentioned side's bearing surface 4A with by bearing surface 14A, as described above, with along with towards front and towards the opposing party's bearing surface 4B with tilted by the mode of bearing surface 14B side, so by pushing like this, cutting insert 11, rear end side towards edge cutter mount pad 4 is pressed into, with this because the above-mentioned the 3rd be pressed in the 3 the by bearing surface 14C and connect on the face 3C, so fixing more firmly.Again, the 3B of maxilla portion not under the state of strain, under a pair of situation little of interval of a pair of bearing surface 4A, 4B by the interval of bearing surface 14A, 14B than cutting insert 11, the head 22B that clamps screw element 22 from lid 26 away from a, side's bearing surface 4A be connected to a side by the moment on the bearing surface 14A, turn back to the 3B of this maxilla portion not the restoring force of the state of strain work, 14A is pressed by bearing surface, and then it is just fastening more strongly to clamp screw element 22 by rotation.

Thereby, clamp mechanism according to the cutting insert 11 of such formation, at first because clamp mechanism 21 makes an approaching side of a pair of jaw parts 3B, 3C a pair of bearing surface 4A, 4B on above-mentioned butt direction and a side strain of leaving, so for cutting insert 11 is clamped, the operation instrument that does not need the such special use of the described grooves expansion of patent documentation 2 keys can be only carries out clamp operation with 1 general operation that is sticked in spanner among the above-mentioned connecting hole 22C etc. with instrument.Therefore, operation is simplified with the management of instrument, and clamp operation self also becomes easily, thereby labour or the time that can cut down the operator are carried out the loading and unloading, replacing of cutting insert 11 efficiently etc.

And then, because like this by clamp mechanism 21, can make a pair of jaw 3B of portion, 3C is also at bearing surface 4A, strain on the direction that 4B leaves, even so will be at this pair of jaw parts 3B, 3C comes a pair of bearing surface 4A under the state of strain, interval between 4B, work becomes a pair of by bearing surface 14A with cutting insert 11, interval between 14B equates, perhaps than by bearing surface 14A, interval between 14B is a little little, by expanding the 3B of jaw portion with this clamp mechanism 21,3C, expansion bearing surface 4A, interval between 4B, cutting insert 11 just can be without any hindering ground to insert in the edge cutter mount pad 4.

Again, at this moment, by being provided with controlling organization 30, just can control deflection, be the interval of a pair of bearing surface 4A, 4B, make that a pair of jaw parts 3B, 3C can be than the interval of a pair of bearing surface 4A, the 4B necessary in order to insert cutting insert 11 earth deformations more.With this, when the loading and unloading of cutting insert 11, can prevent following situation: the operational ton that clamps screw element 22 becomes too much, and perhaps the state of expanding significantly with the interval of a pair of bearing surface 4A, 4B is placed retainer 1, thereby causes a pair of jaw parts 3B, 3C plastic deformation.Thereby, can not make to clamp the clamp mechanism damage that keeps cutting insert 11, open a pair of bearing surface 4A, 4B with the interval that is suitable for cutting insert 11 insertions all the time.

And, if the 3B of jaw portion that will expand like this, 3C turns back to original position, then because at the 3B of jaw portion, 3C is not under the state of strain, a pair of bearing surface 4A, 4B is connected to a pair of by bearing surface 14A of cutting insert 11, on the 14B, perhaps at the 3B of jaw portion, 3C is with under the state of expanding its mode strain at interval a little, bearing surface 4A, 4B pushes these by bearing surface 14A, 14B, so there is not following situation: because in order to insert cutting insert, in jaw portion not under the state of strain, at bearing surface and between by bearing surface, even seldom but also produce the gap, so flexible jaw portion wants reposition when clamping, thereby clamping force is cut down.Thereby, by clamping screw element 22 is further rotated, added thread is screwed into power on the approaching direction of a pair of bearing surface 4A, 4B, this screw thread is screwed into power and makes to become clamping force like this, perhaps by doing to become at the interval between bearing surface 4A, 4B under the state of strain not than little by bearing surface 14A, 14B, the power that the 3B of the upper jaw and the lower jaw portion, 3C just can turn back to original position joins in the clamping force, so, can obtain to keep reliably the abundant clamping force of cutting insert 11 according to the clamp mechanism of above-mentioned formation.

Again, in the present embodiment, make a pair of jaw parts 3B like this, 3C is along a pair of bearing surface 4A of above-mentioned butt direction, the clamp mechanism 21 of a side that 4B is approaching and a side strain of leaving, be to have the outer screw section 22A that is rotatably connected among the 3B of maxilla portion, with can be connected to leaving of above-mentioned butt direction, near both sides be contained in the clamping screw element 22 of the head 22B among the 3C of lower jaw portion, only clamp the rotation of screw element 22 by this, just can make the 3B of maxilla portion leaving as described above in the butt direction, be out of shape near two-side elastic, so clamp operation is more prone to, can further alleviate operator's labour.And, because the rotary manipulation of this clamping screw element 22 is: when upper surface 3E side is observed with the clockwise direction rotation similarly of general right-handed thread spare, a pair of bearing surface 4A, 4B are approaching, cutting insert 11 is clamped, observe when counterclockwise rotating from upper surface 3E side on the contrary, a pair of bearing surface 4A, 4B leave, and remove the clamping of cutting insert 11, so because of this situation of maloperation rightabout ground rotation less, thereby processing ease.

And then, accommodate the above-mentioned accepting hole 25 of the 3C of lower jaw portion of the above-mentioned head 22B of such clamping screw element 22, its 3B of maxilla portion side makes to become minor diameter part 25A, and opposition side makes to become large-diameter portion 25B, above-mentioned head 22B can be in above-mentioned butt direction an approaching side be connected on the tabular surface 25C between minor diameter part 25A and the large-diameter portion 25B, on the other hand, a pair of bearing surface 4A in the butt direction on the contrary, on the side that 4B leaves, because head 22B can be connected to the 3C of lower jaw portion via the lid in the peristome that is installed on above-mentioned large-diameter portion 25B 26, so head 22B is connected to and leaves, near either side, can guarantee the rigidity of its butt area or abutment portion significantly.Therefore, can be when pushing to the 3B of jaw portion and making its strain or make it approach the 3C of lower jaw portion side and when cutting insert 11 clamped last, prevent because its elastic deformation force or screw thread are screwed into power and produce distortion on clamp mechanism 21 or damage this situation, thereby can realize the clamping of the cutting insert 11 of long-term stability.

And, in the present embodiment, because this lid 26, its outer screw section 26A screw thread is screwed into and is installed among the 25D of negative thread portion on large-diameter portion 25B and the peristome 3B of maxilla portion opposition side that is formed on accepting hole 25, the hand of spiral of the screw thread in the threaded portion of these outer screw sections 26A and the 25D of negative thread portion makes to become the opposite direction of the hand of spiral with the screw thread of the outer screw section 22A of the above-mentioned screwed hole 24 of the 3B of maxilla portion and the clamping screw element 22 that spins with it, so a pair of bearing surface 4A in the butt direction as described above, the side that 4B leaves, the end face that clamps the head 22B of screw element 22 is connected on this lid 26, thereby even and then clamp when pushing to the 3B of jaw portion in screw element 22 rotations making, do not exist lid 26 on the end face that is pressed in head 22B with the situation that clamps screw element 22 rotations yet.Therefore, do not exist yet, thereby can realize stable and the loading and unloading of cutting insert 11 reliably owing to so common rotation makes the situation that outer screw section 26A is loosening from the 25D of negative thread portion or this lid 26 breaks away from from accepting hole 25.

Again, so in the present embodiment, the thickness of above-mentioned butt direction is done to become on the thicker 3C of lower jaw portion in the head 3 of retainer 1 leading section, be formed with the accepting hole 25 of the head 22B that accommodates the big footpath that clamps screw element 22, can guarantee to include the space of lid 26 these situations being installed, forming the accepting hole 25 of the length that requires bigger internal diameter and center line O direction reliably.On the other hand, because the screwed hole 24 of the outer screw section 22A of the path that only forming in the 3B of maxilla portion of thinner thickness spins clamps screw element 22 gets final product, be arranged at the position that is in close proximity to edge cutter mount pad 4 so this screwed hole 24 can be run through, especially by a pair of bearing surface 4A in above-mentioned butt direction, when the approaching side of 4B makes the 3B of maxilla portion strain, this screwed hole 24 from edge cutter mount pad 4 away from, the bearing surface 4A that just can be suppressed at a side go up with the cross section of above-mentioned length direction quadrature in produce this situation, prevent bearing surface 4A owing to such inclination become the side that is not connected to cutting insert 11 closely by on the bearing surface 14A, thereby can realize the further clamping of cutting insert 11 reliably.

And be positioned on the front 12A side of cutting insert 11, so also can obtain following advantage because this wall thickness does to become the thin 3B of maxilla portion: the smear metal that is generated by cutting blade 13 is crossed this 3B of maxilla portion easily and is discharged, thereby can realize that smear metal smoothly handles.In addition, in the present embodiment, the 3B of this maxilla portion, side-looking, work becomes and has along with towards front and tabular towards the triangle of the hypotenuse of below, thereby also can lead to the smear metal that flows out to the rear along the front 12A of cutting insert 11, make it further cross the 3B of maxilla portion swimmingly and discharge with above-mentioned hypotenuse part.

And then, in the clamp mechanism of present embodiment, its front of the bearing surface 4A part that is formed at the side on the 3B of this maxilla portion is along with towards front and oblique to the opposing party's bearing surface 4B inclination, and in the cutting insert 11 of present embodiment, the opposing party of this side's bearing surface 4A institute butt by bearing surface 14A similarly with its front part along with towards front and being formed to the opposing party by the oblique mode of bearing surface 14B inclination.Thereby as described above, cutting insert 11 is pressed into the rear side of edge cutter mount pad 4 during clamping, and the 3rd bearing surface 14C is connected on the 3rd bearing surface 4C, just can further stablize and securely with cutting insert 11 clampings with this.

Again, for example while making retainer 1 retreat with respect to workpiece, cut under such situation by the bight of cutting blade 13, also can with respect to towards front act on load on the cutting insert 11, realize anti-avulsion by above-mentioned bearing surface 4A, thereby can prevent these cutting insert 11 changing of the relative positions or such situation that comes off.And, even since like this make bearing surface 4A with partly tilted by the front of bearing surface 14A, and when the insertion of cutting insert 11, must expand a pair of bearing surface 4A biglyyer, under the situation at the interval between 4B, clamp mechanism according to above-mentioned formation, also can easily make a pair of the upper jaw and the lower jaw 3B of portion by the operation of above-mentioned clamp mechanism 21,3C is strain significantly, in addition, at bearing surface 4A, 4B be connected to insertion cutting insert 11 by bearing surface 14A, under the state on the 14B, can prevent that the elastic deformation force from acting on a pair of the upper jaw and the lower jaw 3B of portion, on the direction that 3C leaves, thereby realize the clamping of reliable cutting insert 11.

Then, Fig. 6 is the cutaway view of the 2nd embodiment of expression clamp mechanism of the present invention, to as Fig. 1 to the shared part of the 1st embodiment shown in Figure 5, use same mark, the omission explanation.Promptly, in above-mentioned the 1st embodiment, make to become the tabular surface 25C vertical between the minor diameter part 25A of accepting hole 25 and the large-diameter portion 25B with the center line of this accepting hole 25, and it is discoideus that the head 22B that clamps screw element 22 does to become the profile heavy wall, the back side that is connected to this head 22B on the 25C of this par is also done to become and the vertical plane of center line O that clamps screw element 22, at a pair of bearing surface 4A, when the approaching side of 4B makes the 3B of maxilla portion strain, this back side is connected on the above-mentioned tabular surface 25C closely, with respect to this, in the 2nd embodiment, it is characterized in that, the above-mentioned minor diameter part 25A of accepting hole 25 and the part between the large-diameter portion 25B, with at least one side in the part of the 3B of maxilla portion side among the head 22B that clamps screw element 22, being that the mode that diameter diminishes forms along with undergauge towards this 3B of maxilla portion side and gradually.

More specifically, in the present embodiment, the minor diameter part 25A of accepting hole 25 and the part between the large-diameter portion 25B, it is the center that work becomes center line with this accepting hole 25, from large-diameter portion 25B along with the recessed conical surface-shaped 25F of portion of undergauge towards minor diameter part 25A and gradually, and clamp the back side of the head 22B of screw element 22 towards the 3B of maxilla portion side, work becomes the protruding dome shape 22D of portion that has the center on the center line O of this clamping screw element 22, and the both sides of these parts do to become along with curved surface shape of undergauge gradually of external diameter towards the 3B of maxilla portion side and in it.Promptly, these curved surfaces in the present embodiment, constitute circle respectively with the cross section of its center line quadrature, and when the approaching side of a pair of bearing surface 4A, 4B makes the 3B of maxilla portion strain in above-mentioned butt direction, by between the minor diameter part 25A of accepting hole 25 and the large-diameter portion 25B and clamp the part of the mutual butt in the back side of the head 22B of screw element 22, in the cross section parallel with the above-mentioned center line O that passes through this abutment portion, the curve of doing to become towards the 3B of maxilla portion lateral bending song (is the sag vertical curve to the 3B of maxilla portion side depression in accepting hole 25 sides.In head 22B side is the convex curve that protrudes to the 3B of maxilla portion side).

Thereby, be that fulcrum makes it to the deflection of the 3C of lower jaw portion side by making the 3B of maxilla portion strain with above-mentioned coupling part 3D as described above, thereby in the clamp mechanism with cutting insert 11 clampings, because the 3B of this maxilla portion tilts, the center line of this screwed hole 24 just produces with respect to the center line of the accepting hole 25 of the 3C of lower jaw portion, head 22B when clamping just being arranged on the part between minor diameter part 25A that is connected to accepting hole 25 and the large-diameter portion 25B with this, and be rotatably connected in the above-mentioned screwed hole 24 between the outer screw section 22A, clamping the drawback that produces bending or distortion on the screw element 22, on the other hand, the bending that the 3B of this maxilla portion is accompanied by this clamping screw element 22 in the 3B of maxilla portion is strain on the bias also, have an above-mentioned side's bearing surface 4A be not connected to closely cutting insert 11 a side by the drawback on the bearing surface 14A.With regard to this point, in above-mentioned the 1st embodiment, the external diameter that the internal diameter of minor diameter part 25A is done to become than outer screw section 22A has the gap slightly greatly, clamp screw element 22 to a certain degree with the inclination servo-actuated of above-mentioned center line thereby can make, but in the 1st embodiment that the mode on the tabular surface 25C that is connected to accepting hole 25 with roughly discoideus head 22B makes, tilt like this if clamp screw element 22, then thereby both may be impaired stable with the mode butt of a contact.

But, with respect to this, in the clamp mechanism of above-mentioned the 2nd embodiment, because make to become the recessed conical surface-shaped 25F of portion between the minor diameter part 25A of accepting hole 25 and the large-diameter portion 25B, and the protruding dome shape 22D of portion is made to become in the back side towards the 3B of maxilla portion side that clamps the head 22B of screw element 22, even tilt so clamp screw element 22, these recessed conical surface-shaped 25F of portion and the protruding dome shape 22D of portion also can keep the state of the mode butt that contacts with line mutually.Thereby, according to present embodiment, even on the 3B of maxilla portion, produce as described above, also can make with clamping screw element 22 and its servo-actuated and fascinate, can prevent from clamping screw element 22, to produce crooked, thereby prevent its distortion or damage, and can prevent the 3B of maxilla portion strain on the bias, thereby make a side bearing surface 4A and be close to butt reliably by bearing surface 14, and because even clamping screw element 22 fascinates like this, also can guarantee the clamping stability of cutting insert 11 fully, thus can keep cutting insert 11 reliably, thus realize cutting smoothly.

In addition, in the present embodiment, as described above, the minor diameter part 25A and the part between the large-diameter portion 25B of accepting hole 25 are formed the recessed conical surface-shaped 25F of portion, the head 22B back side that clamps screw element 22 is formed the protruding dome shape 22D of portion, both sides form in the mode of its diameter towards the 3B of maxilla portion side ground undergauge, and any one party forms like that but only incite somebody to action wherein, and the opposing party does to become the 1st embodiment like that also can.For example, even clamping the head 22B and the 1st embodiment of screw element 22 similarly does to become discoideus, form the above-mentioned recessed conical surface-shaped 25F of portion on accepting hole 25 sides or on the 3B of maxilla portion side, forming recessed concave spherical surface shape portion, because the crest line portion of intersecting of the back side of above-mentioned head 22B and side face when clamping screw element 22 and fascinating, contact with these recessed conical surface-shaped 25F of portion or concave spherical surface shape portion line, so also can realize stable clamping.

Again, on the contrary in accepting hole 25, with the 1st embodiment similarly, the tabular surface 25C vertical with its center line will be made to become between minor diameter part 25A and the large-diameter portion 25B, the back side that clamps the head 22B of screw element 22 made to become the above-mentioned protruding dome shape 22D of portion or be that the dome conical surface shape portion at center also can with the center line that clamps screw element 22, if clamping screw element 22 under this situation fascinates, then these protruding dome shape 22D of portion or dome conical surface shape portions, contact with the minor diameter part 25A of accepting hole 25 and the crest line portion of the intersecting line of tabular surface 25C, thereby guarantee to clamp stability.And then, make to become the protruding dome shape 22D of portion if will clamp the head 22B back side of screw element 22, and form the above-mentioned concave spherical surface shape portion that to slip with this protruding dome shape 22D of portion in accepting hole 25 sides, even then clamping screw element 22 fascinates, also can be with them approaching face state of contact butt, thus can realize clamping the further raising of stability.Again, do to become at the head 22B back side that will clamp screw element 22 like this under the situation of dome conical surface shape portion or protruding dome shape portion, the minor diameter part 25A of accepting hole 25 and the part between the large-diameter portion 25B, can do to become cross section along the center line of this accepting hole 25 in it protruding song of all sides, along with towards the above-mentioned maxilla 3B of portion side and the curved surface of undergauge.But, if the concavo-convex conical surface-shaped that the part between the minor diameter part 25A of these accepting holes 25 and the large-diameter portion 25B and these both sides of the back side of above-mentioned head 22B equate mutually for taper angle, then may hinder clamping the smooth and easy of screw element 22 to fascinate on the contrary, so with these both sides with diameter under the situation that the mode that the 3B of maxilla portion diminishes forms, it is desired avoiding such combination.

And then Fig. 7 and Fig. 8 are the figure that represents the 3rd and the 4th embodiment of clamp mechanism of the present invention respectively, to as Fig. 1 to the shared part of the 1st, 2 embodiments shown in Figure 6, also use same mark.In addition, in the 3rd embodiment, with the 1st embodiment similarly, make to become the tabular surface 25C vertical between the minor diameter part 25A of accepting hole 25 and the large-diameter portion 25B with its center line, and it is discoideus that the head 22B that clamps screw element 22 forms heavy wall, in the 4th embodiment, with the 2nd embodiment similarly, make to become the recessed conical surface-shaped 25F of portion between the minor diameter part 25A of accepting hole 25 and the large-diameter portion 25B, and the protruding dome shape 22D of portion is made to become in the head 22B back side of clamping screw element 22.

And, in above-mentioned the 1st, 2 embodiments, the center line O of mutual coaxial clamping screw element 22 and the center line of installing hole 23, with respect to above-mentioned elongated surfaces that slit 3A extended and be vertically formed, with respect to this, in these the 3rd, 4 embodiments, it is characterized in that this center line O tilts with respect to above-mentioned elongated surfaces.Again, the direction that this center line O is tilted, work become from the 3C of lower jaw portion towards the 3B of maxilla portion side ground, towards above-mentioned length direction front and the direction that is formed with the above-mentioned side 2A side the shank 2 of retainer 1 of edge cutter mount pad 4 (in Fig. 3, the direction that the ZZ line in expression cross section is extended), promptly, center line O overlooks, on the direction that the width with respect to this length direction or bearing surface 4A, 4B also tilts, extend.

In these the 3rd and the 4th embodiments, because the center line O of installing hole 23 and clamping screw element 22 is like this to tilt at this above-mentioned width towards the mode of edge cutter mount pad 4 sides towards the 3B of maxilla portion side ground from the 3C of lower jaw portion, so even it is roughly the same to be formed at the position of the above-mentioned accepting hole 25 among the 3C of lower jaw portion, the position of the screwed hole 24 that the outer screw section 22A of clamping screw element 22 is spun in the 3B of maxilla portion, compare with the 1st and the 2nd embodiment, also can do to become the position of more approaching to inlay cutter mount pad 4.Therefore, can with a side of cutting insert 11 by bearing surface 14A, from more approaching the position directly over it, the bearing surface 4A of the side by edge cutter mount pad 4 comes butt, pushes, thereby can realize the further raising of the clamping stability in the cutting insert 11.

Again, in these the 3rd and the 4th embodiments, the above-mentioned maxilla 3B of portion, with will with the coupling part 3D of the 3C of lower jaw portion as fulcrum, to the mode strain of the 3C of lower jaw portion side deflection, but installing hole 23 and the center line O that clamps screw element 22, also tilting towards the mode of front on above-mentioned length direction towards the 3B of maxilla portion side ground, promptly, tilt in the direction of the inclination that produces along deflection by the 3B of maxilla portion from the 3C of lower jaw portion.Thereby, according to these the 3rd, the 4th embodiments, the center line that can suppress screwed hole 24 is owing to inclination center line with respect to accepting hole 25 in installing hole 23 that the strain because of the 3B of this maxilla portion causes produces this situation, thereby can prevent to clamp the crooked or distortion of screw element 22 more reliably, and also can prevent the 3B of maxilla portion strain on the bias, and then can promote the clamping of stable cutting insert 11.

In addition, this installing hole 23 and the inclination that clamps the center line O of screw element 22, as shown in Figure 3, with respect to the inclination angle of the length direction of the cutting insert of overlooking 11 (in overlooking, for example being inclination angle with respect to the above-mentioned ZZ line of above-mentioned plane P) to make to become 5 °～70 ° scope be desired to α, Fig. 7 and as shown in Figure 8 and for example, it is desired that the angle of inclination beta with respect to above-mentioned elongated surfaces on this ZZ line in the cross section of above-mentioned center line O makes to become 2 °～45 ° scope, if it is littler for rake ratio, then may not play above-mentioned effect fully, if on the other hand on the contrary rake ratio it is bigger, then may center line the rake ratio of O because of the inclination that the strain of the 3B of maxilla portion causes is big, be easy to generate the bending that clamps screw element 22 or the deflection of the 3B of maxilla portion on the contrary.Again, this center line O tiltedly gets final product at least one square neck of above-mentioned length direction or width.And then, under the situation that the center line O that makes installing hole 23 and clamping screw element 22 like this tilts, wish to make the center line O2 that leaves control screw element 31 also to tilt in mode in parallel.

On the other hand, in above-mentioned the 1st to the 4th embodiment, one side of one side's of the edge cutter mount pad 4 of the 3B of maxilla portion side the bearing surface 4A and the upper surface side of cutting insert 11 by the front part of bearing surface 14A, with along with towards front and tilt towards the mode of the opposing party's bearing surface side, but for example load not towards its front act under the cutting insert 11 first-class situations, with these sides' bearing surface 4A with by bearing surface 14A, with the opposing party's bearing surface 4B and parallel by bearing surface 14B, and the mode of straight extension forms and also can on above-mentioned length direction.And then, in these embodiments, thereby lid 26 is screwed in the 25D of negative thread portion of accepting hole 25 its outer screw section 26A screw thread and installs, but also this lid 26 can be made to become the shape for hat that the round-ended cylinder shape is arranged, go up in week within it and form negative thread portion, and the prominent outer screw section that screws togather with this negative thread portion of establishing is formed at cylindrical wall portion on the periphery on the peristome of accepting hole 25, thereby these negative and positive threaded portions are spun, lid 26 is installed in accepting hole 25 and the peristome 3B of maxilla portion opposition side.

Claims (7)

1. the clamp mechanism of a cutting insert, in having mutual opposed a pair of bearing surface and being formed at edge cutter mount pad on the leading section of retainer, insert and sandwich to have and be connected to a pair of on the above-mentioned a pair of bearing surface respectively by the cutting insert of bearing surface, thereby clamp, it is characterized in that, the leading section of above-mentioned retainer is provided with: a pair of jaw parts, respectively be formed with 1 in the above-mentioned a pair of bearing surface, can with above-mentioned by the butt direction of bearing surface butt on strain relatively; Clamp mechanism makes this pair of jaw parts strain, thus make above-mentioned a pair of bearing surface on above-mentioned butt direction relatively near or relatively leave with respect to this butt direction,

Above-mentioned clamp mechanism has for clamping screw element: run through the leading section of above-mentioned retainer and be threaded in outer screw section in the jaw portion of a side in the above-mentioned pair of jaw parts towards above-mentioned butt direction; With with the head in the jaw portion that can be contained in the opposing party towards the leaving of above-mentioned butt direction, near the mode of both sides butt,

In above-mentioned the opposing party's jaw portion, be formed with accepting hole, and in the peristome of this accepting hole and the opposite side of a jaw portion above-mentioned side, lid is installed, described accepting hole has: minor diameter part, and little and above-mentioned outer screw section can insert wherein with relaxing than above-mentioned head towards an above-mentioned side's jaw portion one side opening, diameter; Large-diameter portion is in an opposite side upper shed with an above-mentioned side's jaw portion and can accommodate above-mentioned head.

2. the clamp mechanism of cutting insert as claimed in claim 1, it is characterized in that, above-mentioned lid is the screwed part on the threaded portion that is threadedly connected in the peristome that is formed on above-mentioned accepting hole and the opposite side of a jaw portion above-mentioned side, and the hand of spiral of this threaded portion is the opposite direction of the hand of spiral with the outer screw section of above-mentioned clamping screw element.

3. as the clamp mechanism of claim 1 or 2 described cutting inserts, it is characterized in that, at least one side in the part of an above-mentioned side's jaw portion one side of the above-mentioned minor diameter part of above-mentioned accepting hole and part between the large-diameter portion and above-mentioned head, with along with towards an above-mentioned side's jaw portion one side and the mode that diameter diminishes gradually form.

4. the clamp mechanism of cutting insert as claimed in claim 1 or 2 is characterized in that, in the above-mentioned pair of jaw parts, an above-mentioned side's jaw portion is positioned at the front face side of the cutting blade of above-mentioned cutting insert, and the thickness on its above-mentioned butt direction is thinner than above-mentioned the opposing party's jaw portion.

5. the clamp mechanism of cutting insert as claimed in claim 1 or 2 is characterized in that, the leading section of above-mentioned retainer is provided with controlling organization, and its distance of leaving to the above-mentioned a pair of bearing surface that utilizes above-mentioned clamp mechanism and leave is controlled.

6. the clamp mechanism of cutting insert as claimed in claim 1 or 2 is characterized in that, in the above-mentioned a pair of bearing surface side bearing surface with its front part at least along with tilting towards the mode of the opposing party's bearing surface one side towards front.

7. cutting insert, clamp mechanism by the described cutting insert of claim 6 clamps, it is characterized in that, be connected to being tilted in the following manner an of side of this cutting insert on an above-mentioned side's the bearing surface by bearing surface: at least its front part along with match towards front, with the inclination of an above-mentioned side's bearing surface towards the opposing party by bearing surface one side.

Images