• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE1050288A1
    申请号:SE1050288
    申请日:2010-03-26
    公开日:2011-09-27
    发明作者:Magnus Aare；Helena Paebel
    申请人:Sandvik Intellectual Property；
    IPC主号:
    专利说明:

    40 45 50 55 60 State of the art Both drilling tools and milling tools (pin cutters) of the loose top type are richly described in the patent literature and can be divided into a number of different categories depending on the ideas on which the constructions are based. Thus, some tools use loose ends with rear pins, which fully or partially (together with other coupling details) fulfill the task of centering the loose top relative to the base body. This category includes the tool described in US 6012881, which describes a loose-top drill in which a rear coupling part of the loose-top is axially inserted into a jaw between two inflexible carriers, the insides of which include axially running, torque-transmitting ridges which engage in corresponding grooves in a coupling part included in the loose top, and a rearwardly projecting, central pin is inserted into a center hole opening in the bottom of the jaw. A screw mounted in a radially, through hole in the base body cooperates with this pin, which has the task of locking the loose top relative to the base body. In this case, the center pin is cylindrical and can be inserted with a narrow (form-fitting) fit in a similarly cylindrical center hole, in order to fulfill, together with concave and convex contact surfaces on the carriers and the coupling part, respectively, the task of centering the loose top. However, the simultaneous demands for a fit not only between the center pin and the hole, but also between the carriers and the coupling part, place extreme, if not unattainable, demands on manufacturing precision. In addition, a contradictory problem arises if good precision for adventure were to be achieved, namely that the mounting and disassembly of the loose top becomes difficult to carry out as a result of the centering pin requiring great force to be pushed into or pulled out of the hole.
    In order to obviate the above-mentioned disadvantages of the tool according to US 6012881, it has been proposed by SE 0900844-2 and SE 0900845-9 (not publicly available) to design the centering pin of the loose top with a substantially semi-cylindrical and concentric contact surface with the center axis of the loose top and a diametrically opposite contact surface. which the former can - by means of the screw of the tool - be pressed against the inside of a cylindrical centering hole in the base body. In this way, the centering pin can be given a cross-sectional area which is smaller than the cross-sectional area of the hole, whereby the mounting and disassembly of the loose top is facilitated without compromising the exact centering of the loose top. In this case, however, there is a 50% risk of incorrect mounting of the loose top in connection with the centering pin being inserted into the hole, in that the contact surface of the pin can be turned towards any half of the inner, cylindrical hole wall. OBJECTS AND FEATURES OF THE INVENTION The present invention aims to eliminate not only the serious disadvantages associated with the loose stop tool according to US 6012881, but also the practical mounting difficulties which have been found to be associated with the tools and loose tops which are the subject. for SE 0900844-2 and SE 0900845-9, and which are defined in the preambles of the independent claims 1 and 7, respectively. A primary object of the invention is therefore to create a loose stop tool whose loose stop can, on the one hand, be accurately centered relative to the basic body of the tool, and, on the other hand, is mounted in a simple way without the risk of incorrect mounting. In other words, the operator must be able to mount the loose top in a single predetermined position in a foolproof manner without any effort. A further purpose is to create a loose stop tool, whose two main components, ie. the basic body and the loose top, respectively, must be able to be manufactured in a rational and economical way while achieving the desired simplicity of assembly. In addition, the invention aims to create a loose stop, the centering pin of which is strong and robust.
    According to the invention, at least the primary object is achieved by means of the features stated in the characterizing part of claim 1. Advantageous embodiments of the tool according to the invention are further defined in the dependent claims 2-7.
    In a second aspect, the invention also relates to a loose stop as such. The vital features of this loose top appear from the independent claim 8, and advantageous embodiments thereof are defined in the dependent claims 9-12.
    In a third aspect, the invention also relates to a basic body of the kind set out in claims 13-15.
    Brief description of the accompanying drawings In the drawings: FIG. 1 is a perspective view of a loose stop tool in the form of a drill, the basic body and loose stop of which are shown in a composite, operative condition, FIG. 2 is a partially cut-away exploded view showing the loose top separated from the base body, FIG. 3 is an enlarged exploded view showing a jaw included in the basic body in a bird's eye view and the loose top in a frog's perspective view, 95 100 105 110 115 FIG. 4 is a partial side view showing a front part of the base body with mounted loose top, FIG. Fig. 5 shows a section V-V in Fig. 4, showing a locking screw in contact with a centering pin on the loose top, 6 an analogous section showing the screw separated from the base body, FIG. 7 a further enlarged cross section through the base body only, FIG. 8 shows a cross section through the centering pin of the loose top, FIG. 9 is a schematic view showing the geometric design of the center hole in detail, FIG. 10 is an analogous view showing the geometric configuration of the centering pin, and FIG. 11 shows a cross section through a basic body, the center hole of which has an alternative design.
    Detailed description of preferred embodiments of the invention In the drawings, the loose top tool according to the invention is exemplified in the form of a spiral drill, which comprises a base body 1 and a loose top 2, in which required cutting edges 3 are included. In its assembled, operative condition according to Fig. 1, the tool is rotatable about a geometric center axis denoted by C, more specifically in the direction of rotation R. The basic body 1 includes front and rear ends 4, 5, between which a center center C1 specific to the basic body extends. In the rearward direction from the front end 4, a cylindrical or rotationally symmetrical circumferential surface 6 extends, in which are recessed two chip channels 7, which in this case are helical, but which can also be straight. In the example, the chip channels 7 end in a collar 8, which separates the front part 9 of the base body from a rear part 10, which has a diameter larger than the part 9, and is intended to be fastened to a driving machine (not shown). The loose top 2 also includes front and rear ends 11, 12 and a separate center shaft C2, with which two jacket surfaces 13 are concentric. Between the jacket surfaces 13 are recessed two helical chip channel sections in the form of concave surfaces 14, which form extensions of the chip channels 7 of the base body 1, when the loose top is mounted on the base body.
    To the extent that the loose top 2 is centered correctly in relation to the base body 1, the individual center axes C1 and C2 coincide with the center axis C of the composite tool. Since most of the base body 1 is of no interest in connection with the invention, only its front end portion to be illustrated together with the loose top 2, more precisely on an enlarged scale.
    As can be seen from Fig. 3, a jaw 15 is formed in the front end 4 of the basic body 1, which is delimited by two diametrically opposite carriers 16a, 16b and an intermediate bottom 17, which in this case has the shape of a flat surface. which extends at right angles to the center axis C1. The carriers 16a, 16b in this case consist of inflexible lugs, as opposed to elastically resilient legs. The bottom 17 opens a center hole 18, which extends axially into the base body so far that a screw hole 19 (see Figs. 5-7) can open therein. This screw hole 19 is formed with a female thread 20 and concentrically with a geometric center axis C3, which extends radially inside the base body, in this case at right angles to the center axis C1 of the base body. Note that the screw hole 19 is recessed in the material present between the two concave surfaces which form the chip channels 7. Fig. 7 further shows that the screw hole 19 extends between an inner orifice 19a, which opens into the center hole 18, and an outer orifice. 19b, which opens into the mantle surface 6 of the base body 6.
    The female thread 20 of the screw hole 19 cooperates with a male thread 21 (see Fig. 6) on a screw 22, which in a rear end 23 includes a key grip 24 for a tool (not shown), by means of which the screw can be tightened or loosened from the screw hole. 19. The front end of the screw 22 in this case comprises partly a flat end surface 25 and partly a conical surface 26, which forms a transition surface between the end surface 25 and the male thread 21.
    In the preferred example shown, the loose top 2 is formed by a single, simple head, which is laterally delimited by two opposite, flat contact surfaces 27 in addition to the jacket surfaces 13 and the concave surfaces 14, which form chip channel sections. In the rearward direction this head is delimited by a flat surface which extends at a right angle to the center axis C2 and forms the rear end 12 of the loose top. As previously pointed out, the two cutting edges 3 are included in the front part of the loose top. More specifically, the two cutting edges 3 converge in a central tip 28 (see Fig. 4) located along the center axis C2 of the loose top. The side contact surfaces 27 of the loose top cooperate with the insides of the carriers 16a, 16b, which have the shape of flat surfaces 29 (see Fig. 3). In the operative state of the tool, the rear end surface 12 of the loose top is held against the flat surface which forms the bottom 17 of the jaw 15 while the two side contact surfaces 27 of the loose top are held against the support surfaces 29 on the insides of the carriers. In this operative condition, a centering pin 30 is inserted in the center hole 18, which protrudes axially rearwardly from the rear end surface 12 of the loose top 2.
    The rear, free end of this pin 30 is represented in the example by a flat end surface 31, while the front end denoted by 32, which forms an integral part of the loose top, is represented by a circumferential boundary line between the pin 30 and the end surface. 12.
    Reference is now made to Figs. 5-10, which illustrate in more detail the nature of the centering pin 30 and the center hole 18.
    The cross-sectional shape characteristic of the center hole 18 is best seen in Figs. 7 and 9. A first sub-surface 33 included within the inside of the hole (= the hole wall) is cylindrical and has both an axial and a circumferential extent to serve as a support surface for the centering pin 30.
    The circle defining the cylindrical shape of the support surface 33 has a center point MP1, which coincides with the center axis C1 of the base body. The radius of the support surface 33 is denoted r1 and its peripheral extent is determined by two boundary generators 34a, 34b, between which the arc angle ot, in this case, is greater than 180 °. In the concrete example according to Figs. 7 and 9, ot thus amounts to approx. 230 °. The inside of the center hole 18 further comprises a partial surface in the form of a clearance surface generally designated 35, which, like the support surface 33, has both an axial extension and a peripheral one. This clearance surface 35 includes a plurality of sub-surfaces 36a, 36b, 36c, of which the sub-surface 36a is concave and in this case cylindrical, while the sub-surfaces 36b, 36c are flat and form transition surfaces between the support surface 33 and the sub-surface 36a. As can be seen with the naked eye in Fig. 9, the radius (without designation) of the sub-surface 36a is smaller than the radius r1 of the support surface 33. In the example, the two sub-surfaces 36b and 36c converge towards the sub-surface 36a, whereby the center hole 18 is imparted a drop-like cross-sectional shape.
    In Fig. 9, S1 further denotes a circle, which is inscribed along the cylinder surface 33 and which therefore has the same radius r1 as this. Fig. 9 further shows that a plane of symmetry SP1 divides the center hole 18 into two mirror-symmetrical halves.
    Referring now to Figures 8 and 10, which illustrate the geometric design of the centering pin 30. Like the center hole 18, the pin 30 generally has a droplet-like cross-sectional shape, which is essentially determined by a contact surface designated by 38 and 38 in its entirety by 39. The contact surface 38 is in this case cylindrical and extends between two boundary generators 40a, 40b, more precisely along an arc angle ß, which is to be less than 180 °. In the example according to Fig. 10, ß thus amounts to approx. 140 °. However, ß can vary both upwards and downwards from this value, provided that the value falls below 180 °. 185 190 195 200 205 210 The release surface 39 of the centering pin includes a number of sub-surfaces, namely a pair of convex transition surfaces 41 and a pair of flat sub-surfaces 42, which converge in the direction from the contact surface 38 towards a common, convex back surface 43. Fig. 8 shows that the convergence angle γ between the surfaces 42 amounts to approx. 60 °. The center point MP2 of the circle defining the cylindrical shape of the contact surface 38 coincides with the center axis C2 of the loose tip 2. In other words, the surface 38 is concentric with the center axis of the loose top and has a radius rg. A circumscribed circle S2 along the outer cylindrical contact surface 38 thus has the radius rg.
    In this context, it should be noted that the contact surface 38 does not necessarily have to be cylindrical. Thus, it may, for example, have an elliptical shape provided that the radial distances or radii rg between the midpoint MP2 (= C2) and the two boundary generators 40a, 40b are equal.
    A basic feature of the invention is that the cross-sectional area of the center hole 18 is larger than the cross-sectional area of the centering pin 30 for the outer release surface 39 of the centering pin to release from the inner release surface 35 of the center hole, as clearly shown in Fig. 7. A characteristic feature is further that contact surface 38 circled circle S2 has the same radius rg as the radius r1 of the inscribed circle S1 of the internal support surface 33 (ie r1 and rg are equal). In addition, a largest radial distance RD2 between the center axis of the loose top, i.e. the center point MP2 in Fig. 10, and a point on the clearance surface 39, on the one hand, larger than the radius rg of the circumscribed circle S2, but, on the other hand, less than a largest radial distance RD1 between the center axis C1 = = MP1 in Fig. 9) and the inner clearance surface 35. Due to this geometry, the centering pin can only be inserted into the center hole in a single way, namely with the comparatively narrow back surface 43 facing the inner clearance surface 35 in the center hole.
    Should the loose end of the hazard be kept rotated 180 ° relative to the position according to Fig. 7, thus any insertion of the centering pin 30 into the center hole 18 is made impossible. The cross section of the centering pin 30 is also divided into two mirror-symmetrical halves by a plane of symmetry SP2.
    As best seen in Fig. 3, in the centering pin 30, more specifically its release surface 39, a seat 44 is recessed, which is spaced from the free end 31 of the pin and includes a bottom surface 45, which in this case is flat and merges into two flat bevel surfaces 46a. , 46b, which each form an obtuse angle with the bottom surface 45. The rear of these bevel surfaces, namely the bevel surface 46b (see Fig. 2), forms a stop surface for the screw 22. More specifically, the surface of the disc 215 220 225 230 235 240 245 26 to be applied to the surface 46b, thereby preventing the centering pin from being pulled out of the center hole. Furthermore, the front end surface 25 of the screw will be partially abutted against the bottom surface 45 of the seat 44, more specifically for the purpose of applying a torque to the pin which seeks to abut both side contact surfaces 27 of the loose top against the inner support surfaces 29 of the carriers 16a, 16b. To enable such rotation, the screw is generally inclined relative to the bottom surface 45 of the seat. Fig. 7 thus shows how the center axis C3 of the threaded hole 19 and the plane of symmetry SP1 through the center hole 18 form an angle ö with each other. In Fig. 7, this angle is exaggerated (amounts to approx. 20 °) for gaining clarity. In practice, however, the same can be limited to the order of 2-5 °.
    In the preferred embodiment, the back surface 43 of the centering pin extends already from the free end of the pin (and runs - with the exception of the seat 44 - all the way to the rear end surface 12 of the loose top). In this way it is ensured that the centering pin 30 cannot even be partially inserted into the center hole 18. Thus, should the loose end be inverted, even the free end of the centering pin cannot be inserted into the center hole, so the operator can quickly correct the error.
    From Fig. 3 it further appears that the mouth of the center hole 18 includes a conical surface 47 with the task of facilitating the insertion of a correctly turned centering pin into the hole.
    Function and advantages of the invention When the loose top 2 is to be mounted in the jaw 15 of the base body 1, the screw 22 is unscrewed a distance from the screw hole 19 so as not to protrude into the center hole 18. Where the loose top 2 is straight, the centering pin 30 can therefore be freely inserted into the center hole. end surface 12 is applied to the bottom surface l7 of the jaw. In the next step, the screw 22 is tightened, whereby the loose top, as previously mentioned, is applied a slight rotational movement (e.g. 2 to 5 °), which ensures that the two side contact surfaces 27 of the loose top are pressed against the inner support surfaces 29 on the carriers 16a, 16b. At the same time, the front, conical surface 26 of the screw 22 is applied to the rear stop surface 46b in the seat 44. In this way, the loose top is also applied a (positive) axial force, by means of which its end surface 12 is mechanically pressed against the bottom surface l7 of the jaw. In this state, the release peak is locked in an operational state. During drilling, the torque applied to the loose top via the carriers 16a, 16b is strong enough to keep the carriers pressed against the side contact surfaces 27 without the aid of the screw. In addition to preventing the loose top from being pulled out of the jaw (eg in connection with pulling the drill out of a drilled hole), the screw thus has the main task of initially holding the loose top so that it does not jerk out of position in connection with the entry of a workpiece. . 250 255 260 265 270 275 When the loose top 2 is to be replaced, its centering pin 30 can be easily pulled out of the center hole 18 after the simple action of unscrewing the screw 22 a distance from the screw hole 19.
    Thus, the extension does not offer any frictional resistance in that the cross-sectional area of the center hole 18 is larger than the cross-sectional area of the centering pin 30.
    Should the operator in connection with installation to the adventure keep the loose top inverted, ie. with the back surface 39 facing the support surface 33 in the center hole, instead of towards the release surface 35, any attempt to insert the pin even a short distance into the hole is made impossible.
    In addition to eliminating the risk of incorrect mounting of the loose top in a foolproof manner, it offers the advantage of a very meticulous centering of the loose top relative to the base body, while both assembly and disassembly of the loose top can be carried out in a quick and easy manner. Another advantage of the invention is, above all due to the simple axial locking of the loose top by means of the radial screw, is that both the side contact surfaces of the loose top and the cooperating support surfaces on the insides of the carriers can be manufactured with great precision and simple means. In particular, the receiving jaw in the basic body can be achieved in a single simple working operation, e.g. using a disc cutter or a grinding wheel. In addition, the centering pin of the loose top can be made with extra high strength in that a lot of material (cemented carbide) can be incorporated in it, more precisely due to its release surface being housed in a release space located radially outside the inscribed circle of the support surface (as opposed to a genuine cylindrical center hole, which of course necessitates a reduction of the cross-sectional area of the centering pin).
    Reference is now made to Fig. 11, which illustrates a basic body 1 whose center hole 18 has a different design than the teardrop-shaped center hole in the previously described embodiment. Thus, in this case, two flat sub-surfaces 36b, 36c which are included in the clearance surface 35 together with a concave, cylindrical sub-surface 36a are mutually parallel. This means that the center hole 18 obtains an oval cross-sectional shape and that not only the support surface 33 but also the partial surface 36a becomes genuinely semi-cylindrical. On the other hand, the centering pin 30 indicated by dashed lines still has the drop-like cross-sectional shape described previously. The oval cross-sectional shape of the hole 18 means in practice that the crescent-shaped space between the inner clearance surface 35 and the outer clearance surface of the centering pin 30 becomes larger than in the previous case. Possible modifications of the invention Within the scope of the appended claims, it is possible to modify the described tool in all sorts of ways. For example, the loose top can be designed with a special coupling part between the centering pin and the front head, in which the cutting edges are included.
    Furthermore, the screw hole can be placed at an acute instead of right angle to the center axis of the base body, more precisely in the direction obliquely backwards / inwards from the mantle surface to accentuate the axial force component applied to the centering pin by means of the screw. The front end of the clamping screw can also be given a different shape than the one shown, e.g. pointed, while the seat in the centering pin is modified to effectively cooperate with the screw. For example, the rear stop surface could be made concave instead of flat. Furthermore, as previously pointed out, the contact surface of the centering pin can be given a shape other than just cylindrical, e.g. elliptical. Also, the clearance surfaces of both the centering pin and the center hole can be given varying shape provided that the conditions according to the claims are met.
    权利要求:
    Claims (15)
    [1]
    A rotatable tool for chip removal processing, comprising on the one hand a base body (1) with front and rear ends (4, 5), between which a first geometric center axis (C1) extends around which the base body is rotatable in a predetermined direction of rotation (R) , partly a loose stop (2), which comprises front and rear ends (11, 12) between which a second geometric center axis (C2) extends, the front end (4) of the basic body (1) comprising one of two carriers (16a 16b) and a jaw (15) delimited by an intermediate bottom (17), in which a part of the loose top (2) is received, and wherein a centering pin (30) projecting axially rearwardly from the loose top is inserted into a bottom of the jaw (15) (17) opening, axial center hole (18), into which opens a threaded hole (19) for a screw (22) cooperating with the center pin, the center hole (18) including a cylindrical support surface (33) concentric with the center axis (C1) of the base body (33) , against which the centering pin (30) of the loose top (2) abuts pressed by means of the screw (22), and wherein the centering pin (30) of the loose top comprises two diametrically opposite, outer surfaces (38, 39), each of which has both an axial extension and a peripheral one, and of which a first (38) forms a contact surface arranged against the support surface (33) of the center hole (18), which extends tangentially between two axially extending boundary generators (40a, 40b), which are located along an imaginary circumscribed circle (S2) with a center point (MP2), which coincides with the center axis (C2) of the loose top (2), and between which an arc angle (ot) is less than 1800, while the other surface forms an outer clearance surface (39), which is out of contact with the inside of the center hole (18) due to the centering pin (18) 30) cross-sectional area is smaller than the cross-sectional area of the center hole, characterized in that the circumscribed circle (S2) has a radius (rg) equal to the radius (r1) of an inscribed circle (S1) along the cylindrical support surface (33) of the center hole (18). ), and that a major radial waiver nd (RD2) between the center axis (C2) of the loose top and a point on the clearance surface (43) of the centering pin (30) is greater than the radius (rg) of the circumscribed circle (S2), but less than a corresponding distance (RD1) between the base body (1) center axis (C1) and a support surface (33) opposite release surface (35) in the center hole, more specifically for the purpose of making it impossible to insert the centering pin (30) into the center hole (18) in any other way.
    [2]
    Tool according to claim 1, characterized in that both the contact surface (38) and the release surface (39) of the centering pin (30) extend from its free end (31) to make it impossible to incorrectly insert the centering pin even partially into the center hole (18). ). 325 330 335 340 345 350 12
    [3]
    Tool according to Claim 1 or 2, characterized in that a seat (44) remote from the free end (31) is recessed in the release surface (39) of the centering pin (30), which comprises a bottom surface (45) and an axial rear end thereof. located stop surface (46) for the screw (22).
    [4]
    Tool according to Claim 3, characterized in that the bottom surface (45) and stop surface (46) of the seat (44) are flat and form an obtuse angle with one another.
    [5]
    Tool according to one of the preceding claims, characterized in that the center hole (18) in the base body (1) has a drop-like cross-sectional shape in that its release surface comprises two wedge-shaped converging sub-surfaces.
    [6]
    Tool according to one of Claims 1 to 4, characterized in that the center hole in the base body has an oval cross-sectional shape in that the release surface comprises two sub-surfaces which extend parallel to one another in the direction from the support surface towards a common transition surface.
    [7]
    Tool according to one of Claims 5 or 6, characterized in that the centering pin (30) of the loose top (2) has a drop-like cross-sectional shape in that its release surface (39) comprises two sub-surfaces (42) which converge in the direction from the contact surface (38). against a common back surface (43).
    [8]
    Loose stop for rotatable chip removal tools, comprising front and rear ends (11, 12), between which extends a geometric center axis (C2), and an axially rearwardly projecting centering pin (30), which includes two diametrically opposite outer surfaces. (38, 39), each of which has an axial distribution as well as a peripheral one, and of which a first (38) forms a contact surface which extends circumferentially between two axially extending boundary generators (40a, 40b) which are located along an imaginary circumscribed circle (S2) with a center (MP2), which coincides with the center axis (C2), and between which an arc angle (ß) is less than 180 °, while the other surface forms a clearance surface (39), characterized therefrom , that a maximum radial distance (RD2) between the center axis (C2) and a point on the clearance surface (39) is greater than the radius (rg) of the circumscribed circle (S2).
    [9]
    Loose stop according to claim 8, characterized in that both the contact surface (38) and the release surface (39) of the centering pin (30) extend axially forward from a free end (31) of the pin. 355 360 365 370 375 13
    [10]
    Loose stop according to Claim 8 or 9, characterized in that a seat (44) remote from the free end (31) of the centering pin (30) is recessed in the release surface (39) with a bottom surface (45) and a stop surface located axially behind it. (46) for a screw.
    [11]
    11. ll. Loose stop according to Claim 10, characterized in that the bottom surface (45) and the stop surface (46) are flat and form an obtuse angle with one another.
    [12]
    Loose stop according to one of Claims 8 to 1, characterized in that the centering pin (30) has a drop-like cross-sectional shape in that the release surface (39) comprises two sub-surfaces (42) which converge in the direction from the contact surface (38) towards a common back surface. (43).
    [13]
    Base body for rotatable chip removal tools, comprising a casing surface (6) and front and rear ends (4, 5), between which extends a geometric center axis (C1) and of which the front end (4) includes a jaw ( 15), which is delimited by two carriers (16a, 16b) and an intermediate bottom (17), into which an axially extending center hole (18) opens, a hole (19) for a screw (22) extending between the center hole ( 18) and the mantle surface (6), characterized in that the center hole (18) is delimited by a cylindrical support surface (33) with the center axis (C1), along which a circle (S1) with a certain radius (r1) is inscribed. , on the one hand, an opposite clearance surface (35), which is located outside the inscribed circle (S1).
    [14]
    14. l4. Base body according to claim 13, characterized in that the center hole (18) has a drop-like cross-sectional shape in that its release surface (35) comprises two sub-surfaces (36b, 36c) converging towards a concave sub-surface (36a).
    [15]
    Base body according to claim 13, characterized in that the center hole (18) has an oval cross-sectional shape in that the release surface (35) comprises two sub-surfaces (36b, 36c) which extend parallel to each other from the support surface (33) towards an opposite, semi-cylindrical delyta (36a).
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    引用文献:
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    法律状态:
    2016-11-01| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1050288A|SE534648C2|2010-03-26|2010-03-26|Rotatable tool for chip separating machining as well as loose stop and basic body for this|SE1050288A| SE534648C2|2010-03-26|2010-03-26|Rotatable tool for chip separating machining as well as loose stop and basic body for this|
    US13/042,396| US9162295B2|2010-03-26|2011-03-07|Rotatable tool for chip removing machining as well as a loose top and a basic body therefor|
    EP11157573.4A| EP2368657B1|2010-03-26|2011-03-10|A rotatable tool for chip removing machining as well as a cutting insert and a basic body therefor|
    ES11157573T| ES2414651T3|2010-03-26|2011-03-10|Rotating tool for machining by chip removal, as well as removable end piece and basic body for it|
    JP2011068282A| JP5837317B2|2010-03-26|2011-03-25|Rotating tool and loose top for cutting and base|
    CN201110080072.8A| CN102198534B|2010-03-26|2011-03-25|Rotatable tool for chip removing maching and loose top and basic body thereof|
    KR1020110026805A| KR101642525B1|2010-03-26|2011-03-25|A rotable tool for chip removing machining as well as a loose top and a basic body thereof|
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