Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
  • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
  • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
  • B23B27/1614—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert
  • B23B27/1622—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert characterised by having a special shape
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B51/00—Tools for drilling machines
  • B23B51/0002—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position
  • B23B51/0003—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts
  • B23B51/00035—Spade drills
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B51/00—Tools for drilling machines
  • B23B51/02—Twist drills
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C5/00—Milling-cutters
  • B23C5/16—Milling-cutters characterised by physical features other than shape
  • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
  • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
  • B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
  • B23C5/2208—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts 
  • B23C5/2213—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts  having a special shape
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2200/00—Details of cutting inserts
  • B23B2200/16—Supporting or bottom surfaces
  • B23B2200/161—Supporting or bottom surfaces with projections
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2205/00—Fixation of cutting inserts in holders
  • B23B2205/12—Seats for cutting inserts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2251/00—Details of tools for drilling machines
  • B23B2251/02—Connections between shanks and removable cutting heads
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T407/00—Cutters, for shaping
  • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
  • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T407/00—Cutters, for shaping
  • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges

Definitions

• the present invention relates to cutting inserts, and in particular their mounting on a support tool.
• a drill For example, if a drill is considered, the associated cutting insert is received in a slot-slot open frontally in diametral position.
• the cutting insert usually has a global shape in aspic language, that is to say a rhombus with two lateral faces in male V, pointing forward and centered on the geometric axis of rotation of the drill, and two faces lateral positioning, male V centered and pointing back.
• the two front lateral faces each delimit, with a large respective face of the plate, two cutting edges in male V, in plan view, and the two rear lateral positioning faces serve for framing by rear support against two lateral framing walls.
• V female of the same form of housing.
• the precision of the registration of the wafer is an important parameter, since any parasitic offset would cause the active tip of the wafer to be off-center, so that the increase in the radial extent of one of the two cutting edges thus caused would produce an increase in the drilling diameter.
• the first cause is related to a mis-clamping of the wafer, and it is relatively easy to design effective clamping mechanisms.
• the second cause is related to the accuracy of the geometry of the contacting surfaces in contact, that is to say the flatness of the two side walls in female V of the housing and the two lateral positioning faces of the wafer. It is also necessary that the two framing V, male and female, have exactly the same angle.
• any parasitic debris, stuck on any of the surfaces of V will distort the framing.
• Such a drill therefore requires a very precise rectification of the body of the tool and the pads, which represents a significant cost.
• the framing is not always perfect, because of the debris.
• the present invention aims to propose a solution that makes it possible to limit the above cost and reduce the risk of imperfect framing.
• the present invention relates first of all to a cutting insert comprising a positioning lateral face squared against a lateral framing wall belonging to a tool holder housing, characterized in that the lateral positioning face comprises, on the one hand, a first framing section comprising a guided relief of two degrees of freedom of movement of the wafer on a bottom of the housing, framing relief having first and second directed lateral surfaces of framing provided to support for framing respectively against first and second leading lateral surfaces belonging to the tool holder housing, and secondly, at a determined distance from the first framing section, a second framing section comprising a third driven lateral surface, framing of another degree of freedom of movement of the plate on the bottom of the housing, by support against a three the leading framing side wall surface belonging to the housing, two of the first, second and third framing surfaces being mutually inclined to provide framing at a projected scroll position relative to the facing sidewall surfaces.
• the concept of the invention is to avoid pressing laterally the wafer by the entire length of one or two side edges.
• the support is of the type of a beam, that is to say in two remote sections, preferably respectively located at two opposite ends of the side face, to avoid any leverage between two supports that would be close, which would increase, at the end of the lateral positioning face, a positioning uncertainty likely to remain at the level of the bearing surfaces.
• the third driven lateral surface may be, at a distance from the led relief, in a direction of local extension of the first section of the lateral positioning face, or it may be in an oblique direction.
• the lateral positioning face may be substantially rectilinear or have a bend, that is to say functionally represent two side walls of registration, for example mutually oriented at 90 degrees.
• the wafer according to the invention can therefore be mounted in any housing, drill or other tool holder, having one or two side walls of framing.
• the first and second driven lateral framing surfaces are turned at least partially in opposite directions relative to a direction of local extension of the lateral positioning face. They thus ensure the framing "in scrolling" in front of the framing wall.
• the led embossing relief is positive, in the form of nose, it is intended to engage in a cavity or notch of registration belonging to the housing wall . It is therefore easy to provide that this notch is of shape and depth such that the first and second driven side surfaces abut, in the said opposite directions, respectively on the first and second leading lateral surfaces of the cavity, so as to determine the "scrolling" position of the lateral positioning face of the wafer in front of the lateral framing wall. A first degree X of freedom in lateral translation of the wafer at the nose is thus fixed. Furthermore, the depression of the nose in the cavity is determined by the shape and size of the nose and the lateral walls leading the cavity, which may for example have a V-shaped centering, which fixes the second degree of freedom Y.
• the leading lateral walls of framing may also respectively form the two parallel flanks of a U-shaped groove, at least one of the two flanks continuing with a fold, at any angle, constituting the bottom of the cavity, on which will stop the nose. This thus fixes, at the level of the nose, the second degree Y of freedom in advance translation of the wafer towards the lateral framing wall considered.
• the led relief is intended to receive, from the driving relief, three framing reaction force components, namely two components of opposite directions which provide the framing X, "in scrolling" in front of the side wall. and a component perpendicular thereto, which will define the frame Y, that is to say the depression between the driving and led reliefs and therefore a guard distance between the rest, not supported laterally, of the lateral positioning face and an area opposite the framing lateral wall considered.
• the led relief may be in one piece, that is to say a nose and / or a cavity limited by the first and second framing surfaces, or it may involve a mass of material whose first and second surfaces of framing are associated with a respective local relief, with possibly a separation distance between the two local reliefs together functionally constituting the led framing relief.
• the led relief can serve as a pawn, initial centering, and then a final movement of sliding of the wafer on the bottom of the housing.
• the led relief will be provided, once coupled to the driving relief, allow a slight pivoting of the wafer around it, that is to say it will constitute an axis for a final movement of circular repulsion of the third side surface carried against the third driving sidewall surface.
• any one of the led relief and the driving relief is a U-shaped groove and the other is a nose of the same width with at least one of the lateral surfaces which is flat, to be able to slide only in depression in the groove, without tilting possible
• the third side surface will have a docking movement of the third driving sidewall surface which will be a translation parallel to the sliding driving direction of the nose in the groove.
• the respective landings of the led relief, by the first and second driven side surfaces, and the third driven side surface will be simultaneous, by identical translations.
• the various lateral supports can be provided relatively punctually, which limits the risk of presence of extra thickness due to debris stuck.
• the first and second framing lateral surfaces extend in mutually inclined global extension directions, that is to say that they generally form a V. If the lateral surfaces considered have a profile not rectilinear, their overall direction of extension can be defined as being parallel to a straight line that would connect two opposite end points of the considered surface, for example a rope in the case of a circular profile side surface.
• the median direction is perpendicular to the direction of extension of the lateral face, so that any manufacturing tolerance in the length of the V or in its angle of separation of the branches causes no positioning defect "in scrolling". It is the same for any tolerance at a leading V relief, that is to say in a housing for the wafer. This is particularly interesting for a drill insert supported by its rear side face, which plate will remain centered. The manufacturing tolerance above will cause only a slight axial shift, which presents no inconvenience.
• the first and second framing lateral surfaces may be curved, and for example convex.
• the driving relief may also be provided with said first and second concave surface leading surfaces, so that one of the reliefs, female, forms a cradle whose radius of curvature of the first and second surfaces / walls is slightly greater or even equal to a radius value of the two corresponding surfaces of the male relief, to allow the slight rotation, mentioned above, of the docking movement of the third driven lateral surface.
• the third lateral surface is carried by a framing heel. In this way, it is ensured a lateral guard distance which avoids any risk of parasitic contact between the side wall of the housing and the sections of the lateral positioning face which have no bearing function.
• the invention also relates to a tool holder adapted to receive a wafer according to the invention, comprising a wafer housing having a framing side wall comprising, on the one hand, a first framing wall section comprising a relief embossing leading edge.
• leading framing relief having first and second lateral surfaces leading framing provided to receive in abutment respectively framing first and second lateral surfaces of the led framing of the wafer, and, on the other hand, at a determined distance from the first framing wall section, a second framing wall section comprising a third driving lateral surface, of framing a further degree of freedom of movement of the wafer on the bottom of the framing wall.
• housing by receiving in support of a third led side surface of the wafer, two of the first re, second and third lead-in alignment surfaces being mutually inclined so as to ensure for the sidewall surfaces on the wafer facing it, a frame in an intended position of scrolling.
• first and second leading surfaces for framing are generally at least partly facing in opposite directions with respect to a direction of local extension of the framing side wall.
• first and second planar or planar surface leading surfaces extend in mutually inclined global extension directions.
• FIG. 1 is a side view of the front end of the drill equipped with the wafer in plan view, placed on the bottom of a housing formed in the drill, in a position close to a functional position of clamping,
• FIG. 2 is a front view of the drill equipped with the wafer, of FIG.
• FIG. 3 is a side view of the drill bit and the wafer of FIG. 1,
• FIG. 4 is an exploded perspective view of a variant of the drill bit and the wafer of FIG. 1;
• FIG. 5 is a rear perspective view of the wafer of FIG. 4;
• FIG. 6 is a plane view, homologous to FIG. 1, of the wafer and the drill of FIGS. 5 and 6, and
• FIG. 7 is an end view of the drill, alone, of FIG. 4.
• the drill bit partially represented in FIGS. 1, 2 and 3 comprises a barrel 90 of geometric axis of rotation 10, of which only one end is shown. front having a slot 50 in the form of diametrical slot open towards the front, that is to say the bottom of Figure 1.
• the references of axial or radial orientation are based on the axis 10.
• the "forward" direction is here the functional direction of the drill, that is to say, the direction from its rear end to its front end, having the housing 50.
• the housing 50 of Figure 1 is limited by two large lateral clamping surfaces 61 and 62, parallel and axial here, respectively belonging to two cheeks or flanges slightly flexible 63, 64, symmetrically opposite. relative to the axis 10.
• the clamping surface 61 for example, constitutes a bearing surface, or bottom, on which the user slides the plate 9 for the bring in the desired position of framing.
• the clamping is here carried out by a radial screw 80, of geometric axis 80A, whose body passes freely through a passage 66 of the flange 64, and a central hole 8 of the plate 9, to engage with a threaded hole 65 of the flange 63.
• the plate 9 is thus maintained in the diametral plane defined by the two clamping surfaces 61 and 62, but its orientation and its position in this plane are to fix beforehand, which represents 2 degrees of freedom in translation and a degree of freedom in rotation.
• the radial direction in this diametral plane is referenced X and the axial direction is referenced Y, towards the rear.
• a framing wall 53 limiting the rear of the housing 50, has an axial slot 92, however optional, extending in width between the two lateral edges of the rear wall. 53, so that the two flanges 63, 64 are functionally extended all the way backwards and thus form two elastically flexible grippers whose anchoring point, or pivoting in bending, is thus axially behind the housing 50.
• the plate 9 comprises a large bearing surface 1, bearing sliding on the clamping surface 61, opposite a large bearing face 2, facing the clamping surface 62.
• the bearing faces 1 and 2 comprise each a groove 9G substantially axial, with a rounded cross section, chip evacuation, the groove 9G of the bearing face 2 extending on a rear framing nose 39, which therefore has a thickness less than that of the housing 50
• the barrel 90 likewise has, in the rear extension of the two discharge grooves 9G, two respective flutes 9OG, 91 G extending helically rearwardly.
• Figure 2 is a front view of the drill, showing its barrel 90 and a rear base portion, of greater diameter, for its mounting in a tool. It can be seen that because the opposing flutes 9OG, 91G substantially occupy two respective sectors of about 90 degrees "biting" each on a lateral edge of the clamping surfaces 61 and 62 at each discharge groove 9G, the mass of remaining material of the end portion of the barrel 90 occupies two angular sectors whose direction of radial extension of an edge is inclined by about 30 degrees relative to a normal to the clamping surfaces 61, 62.
• the rear ends of the two clamping surfaces 61, 62 are connected by the axially rearward axing side wall 53, constituting a rear stop extending here in a radial plane in a direction of overall extension 40.
• the wall 53 has two radially spaced apart portions which are at least somewhat facing forward. It could indeed be provided that the framing wall 53 extends in an extension direction, along its length and / or according to its thickness, which is inclined on a radial plane.
• the framing wall 53 is of any shape, that is to say non-rectilinear and for example with a sequence of two mutually oblique segments, because its support function is limited to two distant sections.
• the framing wall 53 has a first leading framing section comprising a radial and axial framing relief here constituted by a notch or groove cavity 51 in the form of a notch or V-shaped groove, thus female and here with concave branches. in view from inside the V.
• the framing cavity 49 forms a cradle open towards the front and has symmetrical branches in this example, that is to say with median axial direction, with thus branches radially inclined according to two angles, of overall inclination, of the same value and of opposite signs, and with a bottom line 48, according to the thickness, here oriented in a circumferential direction, therefore perpendicular to the plane of FIG. 1.
• the distance separating the vertexes of the branches of the female V represents the length of the first leading framing section.
• the orientation of the bottom line 48 may be oblique, that is to say, in Figure 1, it may be provided tilted towards the axis 10 and / or forward.
• the branches of the V female respectively comprise first and second lateral surfaces of registration 41, 42 located, generally from the bottom line 48, at a radial distance D of a third lateral surface of registration 43 belonging to a second section of the wall 53, located on the diametrically opposite side.
• the first radially outer framing surface 41 is thus partially turned forward and partially towards the axis 10, along the arrow 41F, while the second framing surface 42, also partially turned towards the front, is turned partially opposite the axis 10, according to the arrow 42F, that is to say somewhat towards the first registration surface 41 in this example.
• the two framing surfaces 41, 42 are turned somewhat toward each other, that is to say that it could be provided, alternatively, that one of these are axial or even turned towards the rear.
• the axial recoil movement, docking of the plate 9 on the framing surface 41 or 42 which would be partially turned towards the rear would be accompanied by a radial movement, for example by sliding on the framing surface 41 or 42 facing forward.
• the first, second and third registration surfaces 41, 42, 43 can be described as "leading" since they are the ones who will lead the wafer 9 to its functional position.
• An intermediate, non-functional, here rectilinear and radial, intermediate surface 44 connects the front end edge of the second radially inner framing surface 42 to a radially inner edge of the third framing surface 43.
• the framing wall 53 is radially limited by a radially extreme lateral surface 45, optional, here radial, knowing however that the front end edge of the radially outer framing surface 41 could constitute an end of the framing wall 53.
• the third framing surface 43 extends to an opposite end.
• the large bearing faces 1 and 2 of the wafer 9 are connected by a rear positioning positioning rear face 3, designed to cooperate with the framing wall 53, and by two diametrically opposite axial side faces 4 and 5, as well as by two end lateral faces 6, 7 occupying axially symmetrical positions and having two respective cutting edges 6A, 7A forming a male V, in plan view in FIG. 1, the point of which is on the axis 10.
• the two cutting edges 6A and 7A are delimited respectively by the two large bearing faces 1 and 2, to both be active in a predetermined direction of rotation about the axis 10, and they are connected by a short radial cutting edge front tip 76 of the plate 9.
• the axial lateral faces 4, 5 could be omitted, or could delimit axial or axially inclined cutting edges for cutting a cone, and the front cutting edges 6 and 7 could for example together form a rounded profile cutting nose .
• the cutting edges would all be limited by the same large support face 1 or 2.
• the lateral positioning face 3 extending generally in a direction of radial extension, has, near one end, a first section comprising a framing relief constituting the nose 39, in this male V rounded, pointing to the rear with a rear top line 38, the same aperture angle and same orientation, in the squared position, that the registration cavity 49.
• a first section comprising a framing relief constituting the nose 39, in this male V rounded, pointing to the rear with a rear top line 38, the same aperture angle and same orientation, in the squared position, that the registration cavity 49.
• top line 38 and the bottom line 48 have different inclinations with respect to a normal to the plane of the large bearing faces 1 and 2, that is to say, angles of tilt towards the axis 10, so that the force of recoil and contact of the framing nose 39 in the framing cavity 49 causes a torque tending to pivot the plate 9 about a virtual axis parallel to the axis 10 and passing through the framing nose 39, thus tending to press a radially opposite zone of the large bearing face 1 or 2, close to the lateral surface 5, on the associated bearing surface 61 or 62, the twisting torque thus created ensuring a better stability.
• the framing nose 39 is limited, radially externally and internally, by first and second framing lateral surfaces 31 and 32 spaced in the extension direction 30, local and also global in this example, and forming two branches radially. spaced from a male V, axial axial plane, turned at least partially in opposite directions relative to the extension direction 30, and which have a convexity radius of curvature substantially equal to the radius of curvature of the concavity of the surfaces of framing 41, 42, so to couple. It is thus constituted a cradle bearing facilitating a slight possible pivoting of the wafer 9 during its framing.
• the framing nose 39 thus constitutes a pivot axis.
• the distance separating the vertices of the branches of the male V 31, 32 represents the length of the first led framing section.
• the respectively concave and convex shapes of the framing cavity 49 and the framing nose 39 are such that there is only support at the opposite branches of framing surfaces 31, 41 and 32, 42, it is that is, the rear top line 38 remains at a distance from the bottom line 48.
• the front side surfaces of the frame cavity 49 represent only an enlarged mouth to facilitate the placement of the framing nose.
• 39 that is, both Corresponding lateral surfaces, at the base of the framing nose 39, are at a distance from the mouth surfaces above once the framing position is reached.
• the registration face 3 further comprises a second portion constituted by a third lateral registration surface 33 located generally at the distance D from the registration nose 39, radially in this example.
• the third framing surface 33 which must be turned at least partially forward to serve as a backstop, is here to extend purely radially (30), that is to say, completely facing forward. It could, however, be provided that the third registration surface 33 is obliquely extending with respect to the radial direction 30, that is to say, functionally replace one of the first and second registration surfaces 31, 32, that it then serves only as a frontal stop, that is to say locally ensuring a guard distance from the framing wall 53. In these conditions, the choice of the precise relative position on the lateral framing surface 3 and / or the increased axial size, by a heel, of the third oblique framing surface 33 also makes it possible to determine a local guard distance opposite it.
• An intermediate lateral surface 34 which is rectilinear and radial, non-functional, connects the radially inner edge of the framing nose 39 to a radially internal facing edge of the third framing surface 33.
• the framing face 3 is here limited by a lateral end surface 35, here rectilinear and radial, of small radial extent, that is to say that the distance D is preferably chosen relatively large compared to a width value of the wafer 9, for example at least 50%, even 70%, even 80%, to have a good rear seat against tipping.
• the first, second and third framing surfaces 31, 32, 33 may be described as "driven” since they will be guided by the leading surfaces 41, 42, 43 to the desired functional position.
• the plate 9 is pressed against the framing wall
• the plate 9 constitutes a transverse beam supported, on one side, by the framing nose 39, on the first and second surfaces of framing 41, 42 of the cavity 49 and, on the radially opposite side, by the third framing surface 33, resting on the third framing leading surface 43.
• one of the third ledge surface 33 and the third ledge surface 43 is slightly projecting.
• axial to the rest of the facing or facing wall 3 or 53 considered, that is to say is deported to the other, behind or respectively forward, relative to its overall direction of radial extension 30 or 40.
• the framing nose 39 is a little longer than the depth value, axial, of the framing cavity 49, to ensure at least a minimum value of the axial guard.
• the positioning of the wafer 9 can be done conveniently by pushing it backwards so as to make the framing nose 39 enter the framing cavity 49 slightly.
• the framing nose 39 then serves radial centering pin in the radial direction X, so that the third driven framing surface 33 is applied to the third leading surface 43 and occupies exactly the desired radial position when the first and second driven surfaces of framing nose 39 are respectively in contact with the first and second framing surfaces 41 and 42, which serve as a bearing.
• a convenient procedure is to depress, as much as possible, the framing nose 39 in the framing cavity 39, even if the (axial) orientation of the wafer 9 is not yet perfect, to then push behind the wafer 9, for example by its front tip 76, so as to rotate it around the framing nose 39 until the third framing surfaces 33 and 43 are in contact. During this rotation, the orientation of the framing nose 39 approaches the desired axial orientation, so that the framing nose 39 terminates its penetration to the bottom 48 of the framing cavity 49. In this example, the contact between the framing nose 39 and the framing cavity
• the registration cavity 49 is a groove extending over a length corresponding to the thickness of the wafer 9.
• the framing nose 39 may not extend. throughout the thickness of the wafer 9.
• the first, second and third registration surfaces 31, 32, 33 have a total registration area value which represents only a small proportion of a surface value of the registration area 3. comprising. Preferably, this proportion is less than 20%, more preferably less than 10%, and even more preferably less than 5%.
• the measurement of each lateral framing surface 31-33 can be carried out by assuming that the corresponding driving framing wall 41-43 has framing reliefs with surface areas. shapes and relative positions exactly complementary to those of the lateral framing surfaces 31-33.
• the first framing section comprising them preferably represents less than 20% of a value of the total length of the lateral surface 3, or its variants, more preferably less than 10%.
• the intermediate lateral surface 34 connecting the radially inner edge of the second lateral framing surface 32 (or its variants) to the radially internal facing edge of the third framing surface 33, has a length (slightly less than the overall distance D) preferably representing at least 50%, preferably at least 70% of the total length value of the side surface 3 having them, most preferably at least 80%. It is therefore this length that separates the first and second framing segments conducted mutually.
• the plate of FIGS. 4, 5, 6 and 7 is a variant, which differs from the embodiment of FIGS. 1 to 3 in that the fixing screw 80, with head 81 and body 82, passes only through the drum 9OA. behind the wafer 9A, so that it is shorter than the wafer 9.
• the unchanged functional elements have retained their reference of FIGS.
• the central hole 8 of the wafer 9 is here omitted, so that the wafer 9A could be made in an axially shorter shape than the wafer 9. Indeed, as the wafer 9 or 9A constitutes a beam in back support by two end of its lateral positioning face 3 or 3A and pushed by its tip, so at mid-length of the beam, the central hole 8 was a weakened area, requiring a wafer
• the flanges 63A, 64A thus form two levers facing each other, from which it is sufficient to bring two respective base sections together so that the two free-end sections delimiting the housing 5OA are closer together, which will thus pinch the plate 9A.
• the nose 39A presents a rounded top profile, with the first and second driven lateral surfaces of 31A and 32A framing, to cooperate with the first and second framing lateral surfaces 4A1, 42A of the notch or cavity 49A in the form of notch or U-shaped groove with flared branches.
• the third lateral framing surface 33A cooperates with the third lateral framing surface 43A formed in the framing wall 53A.
• Figure 7 is a front view of the drill with its drum 9OA, showing the housing

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
• Processing Of Stones Or Stones Resemblance Materials (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)
• Drilling Tools (AREA)

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Publications (1)

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Cited By (1)

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• 2007
  • 2007-05-16 FR FR0703530A patent/FR2916150B1/fr not_active Expired - Fee Related
• 2008
  • 2008-05-16 WO PCT/FR2008/000682 patent/WO2008155484A2/fr not_active Ceased
  • 2008-05-16 US US12/600,258 patent/US20100303561A1/en not_active Abandoned
  • 2008-05-16 EP EP08805579A patent/EP2148755A2/de not_active Withdrawn
  • 2008-05-16 CN CN200880016276A patent/CN101687258A/zh active Pending

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