• 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:
    The clamping device consists of a clamping mandrel (1) and a clamping part (6) which can be fixed thereon in a removable manner. The clamping mandrel (1) is provided with four centering pins (3) which cooperate with centering openings (9) arranged on the output clamping part (6) that the clamping part (6) is oriented during the clamping by clamping on the clamping mandrel (6) in the X and Y direction. The respective centering pin (3) has two lateral surfaces (3a, 3b) ending in a cone, while the centering opening (9) respective is delimited by two side walls (9a, 9b) extending parallel to one another. When fixing the clamping part (6) on the clamping mandrel (1), the side surfaces (3a, 3b) come to bear linearly on the side walls of the centering opening (9).
    公开号:BE1018487A3
    申请号:E2008/0516
    申请日:2008-09-16
    公开日:2011-01-11
    发明作者:Bruno Sandmeier
    申请人:Erowa Ag；
    IPC主号:
    专利说明:

    CLAMPING DEVICE
    The present invention relates to a clamping device with a clamping chuck for locking by clamping a clamping part, with first centering elements arranged on the clamping mandrel which cooperate with other centering elements arranged on the part for clamping the clamping portion in the X and Y directions, the centering elements being formed by centering pins which are intended to engage the other él.ément.s. of age, made as centering holes!
    Such clamping devices are used for the following purposes: r to lock by clamping the defined position of tools, workpieces or. workpieces. The clamping mandrel is generally fixed firmly to a work table, a machining machine, or a press, while the workpiece holder can be fixed as well as to the workpiece. riispuiss s; /: p <-> r ade;, rua: r of such new detachment several times in position sor e sue .15 prrrrie tightening is 0r. i fr.rea 1rr of the precise'of the chuck. "
    A coupling device for the rotational and interchangeable connection of a workpiece with a machining device is known from EP 0 111 092. B2. The device consists of two coaxial coupling members and one. coach tray interposed. A coupling member 1 is clamped by clamping the airfoil. its sutures, provided with a round training post, arranged at p. us; rrr or. d-s door-parts. do not mandei n. gold medium 'as well' as a long tenon drive. oblong, s-coq es1; generally, evening is-men *; on an axle arranged in such a way as to have the central drive channel present. surface envelope troh.cônique, then stinks. the eccentrically disposed drive pin has two lateral surfaces extending parallel to the blade, which extend inclined relative to the axis of The coupling plate is provided with a central circular aperture and an oval-shaped aperture arranged eccentrically with the shape and position of the apertures corresponding to those of the Three spacing pegs are arranged on a coupling member, whose surfaces protrude from the coupling surface and when the coupling device is stretched, bear against the surface of the coupling. The coupling plate is composed of spring steel, the openings therein being adapted to the two drive posts so that the carrier plate is deformed axially and resiliently in the state of rotation. tension of the coupling device in the area of the openings.
    It is an object of the present invention to improve a clamping device having a clamping mandrel and a clamping part which can be releasably attached thereto so that the clamping device is not susceptible to fouling. , the part of. The clamping device can be fixed precisely and repeatedly on the chuck and the centering elements can be manufactured simply and economically. For this purpose, the invention provides a clamping device with a clamping chuck for locking by clamping a clamping part, with first centering elements arranged on the clamping part; clamping chuck which co-operates with other centering elements arranged on the clamping part so that the clamping part 1 is oriented when clamping by clamping on the chuck: in the X direction and Y, the centering elements being formed by centering pins which are intended to engage in the other centering elements formed as centering apertures, characterized in that the centering device has at least three openings of centering and a corresponding number of centering pins, the respective centering pin being provided with two cone-shaped side surfaces and the respective centering aperture being delimited by two parallel extending sidewalls which are made in such a way that the lateral surfaces ending in cone of the respective centering pin come into linear bearing on it.
    In this way, according to the invention, in order to ensure that the clamping part is positioned during clamping on the clamping mandrel with a high absolute precision as well as reproducible, at least three pairs of centering elements are provided which cooperate so that the clamping part is positioned in the clamping position with respect to the clamping mandrel in the X and Y direction as well as with respect to the angular position around the Z axis, a high insensitivity to the fouling being obtained by the linear support of the lateral surfaces, centering pins on the side walls of each centering opening.
    In order to achieve high stability of the clamping clamped clamping portion on the clamping mandrel, four spacer bolts are preferably provided which are relatively far out.
    Also, the clamping device has four centering apertures and a corresponding number of centering pins.
    The device further advantageously has the following characteristics.
    The centering apertures are formed in a one-piece centering disc, which is flexible in spring elasticity at least in the region of the centering openings in the Z direction.
    The centering disc is fixed by means of bolts on a base body of the clamping part.
    The bolts are threaded and are screwed into the base body of the clamping part and the front side of the respective bolt forms a Z stop for pressing on the clamping mandrel.
    The respective centering opening is delimited laterally by a flexible lateral wall in spring elasticity in the direction Z.
    -The centering disc is made of a stainless steel sheet.
    -The centering disc is made of a softer material than the centering pins.
    . The centering apertures are hollowed out by precision cutting of the centering disc.
    The centering disc has a thickness of at most 2 millimeters, in particular a thickness of between 0.8 and 1.5 millimeters.
    -The lateral surfaces of the centering pins are machined very precisely, in particular rectified.
    The centering elements are arranged regularly distributed along a circle (K1, K2).
    The clamping part is provided with a centering disk disposed at a distance from its front end, which is provided with four centering openings, each centering opening being surrounded on either side by the centering disc.
    The chuck is provided with a base body which is provided with flat bearing surfaces for supporting the bolt.
    The centering disk is fixed by means of four bolts provided with a thread on a base body of the clamping part, the front side of the respective bolt forming a Z stop for bearing on the clamping mandrel.
    The invention also relates to a clamping portion for use in a clamping device as above.
    The clamping part is characterized in that it has a base body on which is fixed a centering disc made in one piece, provided with at least three centering holes so that it is elastically flexible. spring in the region of the centering openings in the Z direction.
    Advantageously, the clamping portion is formed as a part housing.
    Finally, the invention relates to a centering disk that is particularly suitable for mounting on a base body a clamping portion for use in a clamping device. It is characterized in that the centering disk is made in one piece and has at least three centering apertures, and in that it is provided with at least three holes for attachment to a base body of a clamping part.
    Advantageously, the centering disk is provided with four centering apertures which are arranged respectively offset by 90 ° relative to one another along a ring, the respective centering opening being delimited laterally by two lateral walls extending parallel to each other.
    A fixing hole is made in the centering disk respectively between two adjacent centering apertures.
    The centering apertures are preferably manufactured by precision cutting.
    Subsequently, a preferred embodiment of the clamping device according to the invention is explained in detail with reference to the accompanying drawings, the figures of which show: FIG. 1: the clamping device in schematic representation during the centering process; Figure 2: the clamping device according to Figure 1 after the centering process; Figure 2a: an enlarged detail of Figure 2; Figure 2b: two centering elements in perspective representation; Figure 3: the clamping device consisting of a chuck and a clamping part; and Figure 4: a preferred embodiment of a centering disc.
    The procedure of the centering elements should be explained in detail by means of Figure 1 which illustrates the clamping device in a schematic cross-section. The clamping device comprises a clamping mandrel 1 and a clamping part 6. The clamping mandrel 1 is provided with a clamping mechanism for locking by clamping a clamping pin arranged on the clamping part. 6, the corresponding clamping means being not shown The clamping part 6 is generally used to receive the workpieces or tools and must be immobilized or fixed in precise and reproducibly position on the chuck. The clamping mandrel 1 and the clamping part 6 are provided with a solid base body 2, 7. The clamping mandrel 1 is provided with first centering / centering elements 3, while the clamping portion 9 has other centering elements in the form of centering apertures 9. Although in the present example, only a centering pin 3 and a centering aperture 9 are shown, the clamping mandrel 1 is gen rattle provided with four centering pins 3 and the clamping portion 6 of a corresponding number of centering openings 9.
    In the present example, the centering openings 9 are formed in a centering disc 8, the function of which is further explained in detail below. The centering disc 8 is arranged by means of bolts 12 at a distance from the front end 6a of the base body 7 of the clamping part 6 of. such that the disk 8 can be deflected towards the base body 7. The front side 13 of the respective bolt 12 forms a Z-stop for the clamping portion 6. The base body 2 of the clamping mandrel 1 is provided with flat bearing surfaces 4 which are intended for bearing on the front side 13 of the bolts 12. The respective centering peg 3 is provided with two cone-shaped end surfaces 3a, 3b which are applied against the side walls 9a, 9b delimiting laterally the respective centering aperture 9. The centering studs 3 are made of a harder material than the centering disc 8. This has the advantage that the conical side surfaces 3a, 3b of the centering studs 3 are hardly worn so that also in the case of a large number of clamping processes, the positioning accuracy is not impaired. In case of possible wear of the side walls 9a, 9b of the centering disc 8, just the surface, the linear contact, bearing on the centering pin 3 is a little wider, which however does not significantly influence the positioning accuracy.
    Figure 2 shows the chuck 1 together with the clamping part 6 fixed on it. When the tightening part 6 is clamped to the clamping mandrel 1, the respective centering pin 3 enters the centering opening 9. The lateral surfaces 3a, 3b of the centering pin 3 bear against the walls 9a, 9b delimiting the centering opening 9 of the centering disc 8, whereby the centering pin 3 or the clamping portion 6 is oriented relative to the clamping mandrel 1. By providing four centering pins 3 and a corresponding number of centering apertures 9, the clamping part 6 is oriented during clamping clamping on the clamping mandrel 1 in the X and Y direction as well as with respect to the angular position around the Z axis.
    In the state represented here, in which the two lateral surfaces 3a, 3b extending in cone of the centering pin 3 are applied against the walls 9a, 9b delimiting laterally the centering opening 9 of the centering disc 8, there is a linear contact between the centering pin 3 and the respective side wall 9a, 9b. The centering pins 3 are dimensioned for this purpose so that the centering disk 8 is easily deflected by the respective centering pin 3 towards the base body of the clamping part 6 before the spacer bolts 12 -support with their front surface 13 on the flat bearing surfaces 4 of the chuck 1. Figure 2a shows in cross-section and in enlargement how a lateral surface 3a of the centering pin 3 bears on the wall 9a delimiting laterally the opening of the centering disc 8. Seen in cross section, there is produced between the lateral surface 3a of the centering pin 3 and the side wall 9a of the centering opening 9 a point support.
    Figure 2b shows in perspective the centering pin 3 engaging in a centering opening 9. The linear contact between the centering pin 2 and the walls laterally delimiting the opening 9 is indicated by gray lines LI, L2. Such a linear contact has, unlike a surface support, the advantage that the centering elements 3, 9 are not very sensitive to fouling, since there is a high surface charge and that any impurities are scraped or pushed back during the insertion of the centering pin 3 into the centering opening 9. In any case, a high absolute precision as well as reproducible can be obtained in this way during the centering of the respective centering pin 3. relative to the centering aperture 9 and thus the clamping part 6 with respect to the clamping mandrel 1. The centering disc 8 is preferably made of a stainless steel sheet, the centering apertures 9 'being preferably generated at using precision cutting.
    The thickness of the centering disk 8 is approximately between 0.8 and 1.5 mm. Such a centering disc 8 can be manufactured relatively economically. The side surfaces 3a, 3b. centering pins 3 are machined very precisely, in particular rectified.
    Fig. 3 shows a preferred embodiment of the clamping device consisting of the clamping mandrel 1 and the clamping part 6 which can be locked by clamping thereon. The clamping mandrel is composed of a cylindrical base body 2 on which four centering pins 3 extending in the Z direction are arranged. The four centering pins 3 and the four centering apertures 9 are arranged offset. respectively 90 ° relative to each other along a ring K1, K2. As can be seen, each centering aperture 9 is surrounded on each side by the centering disk 8. For clamping a clamping pin disposed on the clamping portion 6, the clamping mandrel 1 is generally provided with a clamping mechanism neither the clamping mechanism nor the clamping pin being shown in the present example. In the surface of the base body 2 are provided flat bearing surfaces 4, on which the spacer bolts 12 can bear with their front side.
    The clamping part 6 has a centering plate 8 which is fixed by means of spacers 15 to the base body 7. The spacers 15 can be made as separate elements, fixed to the base body 7. As a variant, they can also be made in one piece with the base body 7. Another variant is that the base body 7 is provided with a substantially planar front side which is provided with recesses just in the area of the openings of centering 9 respective.
    The actual fixing of the centering plate 8 is effected by means of the spacer bolts 12, whose front end serves as a stop for the clamping part 6. The spacer bolts 12 are preferably provided with a rear thread, by means of which they can be fastened in an internal thread of the respective spacer or base plate 7. The spacer bolts 12 are placed relatively far out to obtain a high stability of the part of the Clamp 6 clamped by clamping on the chuck 1. Preferably, the spacer bolts 12 are arranged in the outer quarter of a virtual ring K3, placed at the radially extreme points of the clamping portion 6.
    The longitudinal center axes of the centering pins 3 and the centering apertures 9 extend parallel to the radius with respect to the Z axis ZI of the clamping mandrel 1 or the clamping part 6. In any case, precise positioning repeatedly in the direction of the clamping part 6 with respect to the clamping mandrel 1 in the X and Y direction as well as with respect to the angular position about the Z axis is permitted by the arrangement of the centering elements 3, 9. By providing spacers 12 of the type described which are applied against the flat bearing surfaces 4 of the clamping mandrel 1, a very precise positioning is also permitted in the Z direction.
    Figure 4 shows the centering disc 8 made in one piece. In order to be able to fix the centering disk 8 by means of the spacer bolts, a hole 16 is formed in the centering disk 8 respectively in the middle between two contiguous centering apertures 9.
    Of course, the invention is not limited to the embodiments described above and shown, from which we can provide other modes and other embodiments, without departing from the scope of the invention. .
    权利要求:
    Claims (22)
    [1]
    1. Clamping device with a clamping chuck (1) for locking by clamping a clamping part (6), with first centering elements (3) arranged on the clamping mandrel (1) which cooperate with other centering elements (9) arranged on the clamping part (6) so that the clamping part (6) is oriented in the clamping position on the clamping mandrel (1) in the X and Y directions, the centering elements being formed by centering pins (3) which are intended to engage in the other centering elements formed as centering apertures (9), characterized in that the centering device has at least three centering apertures (9) and a corresponding number of centering studs (3), the respective centering peg (3) being provided with two cone-shaped end surfaces (3a, 3b) and the centering aperture (9). ) being delimited by two lateral walls (9a, 9b) extending parallel which are made so that the side surfaces (3a, 3b) ending in cone of the respective centering pin (3) abut linearly above.
    [2]
    2. Clamping device according to claim 1, characterized in that the clamping device has four centering apertures (9) and a corresponding number of centering pins (3).
    [3]
    3. Clamping device according to claim 1 or 2, characterized in that the centering apertures (9) are formed in a centering disc (8) in one piece, which is elastically flexible. at least in the region of the centering apertures (9) in the Z direction.
    [4]
    Clamping device according to claim 3, characterized in that the centering disk (8) is fixed by means of bolts (12) to a base body (7) of the clamping part (6).
    [5]
    Clamping device according to Claim 4, characterized in that the bolts (12) are provided with a thread and are screwed into the base body (7) of the clamping part (6), and in that the the front end (13) of the respective bolt (12) forms a Z-stop for pressing on the clamping mandrel (1).
    [6]
    6. Clamping device according to claim 3, characterized in that the respective centering aperture (9) is delimited laterally by a flexible side wall (9a, 9b) elastically resilient in the direction Z.
    [7]
    7. Clamping device according to any one of claims 3 to 6, characterized in that the centering disc (8) is made of a stainless sheet.
    [8]
    8. Clamping device according to any one of claims 3 to 7, characterized in that the centering disc (8) is made of a softer material than the centering pins (3).
    [9]
    9. Clamping device according to any one of claims 3 to 8, characterized in that the centering apertures (9) are recessed by precision cutting of the centering disc (8).
    [10]
    10. Clamping device according to any one of claims 3 to 9, characterized in that the centering disc (8) has a thickness of 2 millimeters at most, in particular a thickness of between 0.8 and 1, 5 millimeters.
    [11]
    11. Clamping device according to any one of the preceding claims, characterized in that the lateral surfaces (3a, 3b) of the centering pins (3) are machined very precisely, in particular rectified.
    [12]
    12. Clamping device according to one of the preceding claims, characterized in that the centering elements (3, 9) are arranged regularly distributed along a circle (K1, K2).
    [13]
    Clamping device according to one of the preceding claims, characterized in that the clamping part (6) is provided with a centering disk (8) arranged at a distance from its front side, which is provided with four openings centering device (9), each centering aperture (9) being surrounded on each side by the centering disk (8).
    [14]
    Clamping device according to Claim 5, characterized in that the clamping mandrel (1) is provided with a base body (2) which is provided with flat bearing surfaces (4) for supporting the bolts. (12).
    [15]
    Clamping device according to one of the preceding claims, characterized in that the centering disk (8) is fixed by means of four bolts (12) provided with a thread on a base body (7) of the clamping part (6), the front side (13) of the respective bolt (12) forming a Z-stop for pressing on the clamping mandrel (1).
    [16]
    16. Clamping part (6) intended for use in a clamping device according to any one of claims 1 to 15.
    [17]
    Clamping part (6) according to Claim 16, characterized in that the clamping part (6) has a base body (7) on which is fixed a centering disc (8) made in one piece. provided with at least three centering apertures (9) so that it is resiliently resilient in the region of the centering apertures (9) in the Z direction.
    [18]
    Clamping part according to Claim 17, characterized in that the clamping part (6) is designed as a part-housing.
    [19]
    Centering disk (8) for mounting on a base body of a clamping portion (6) for use in a clamping device according to one of Claims 1 to 15, characterized in that the centering disk (8) is made in one piece and has at least three centering apertures (9), and in that it is provided with at least three holes for attachment to a base body (7) a clamping part (6).
    [20]
    20. Centering disc, (8) according to claim 19, characterized in that the centering disc (8) is provided with four centering openings (9) which are arranged offset by 90 ° respectively relative to each other along a ring (K2), the respective centering aperture (9) being delimited laterally by two side walls (9a, 9b) extending parallel to one another.
    [21]
    21. Centering disc (8) according to claim 19 or 20, characterized in that a fixing hole (16) is formed in the centering disc (8) respectively between two contiguous centering openings (9).
    [22]
    22. Centering disk (8) 'according to any one of claims 19 to 21, characterized in that the centering apertures (9) are manufactured by precision cutting.
    类似技术:
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    FR2692010A1|1993-12-10|Connecting block and assembly for profiled bars and bar assembly by applying.
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    FR2542652A1|1984-09-21|COUPLING DEVICE FOR MODULAR TOOLS
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    同族专利:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH11442008|2008-07-22|
    CH01144/08A|CH699231B1|2008-07-22|2008-07-22|Tensioning device.|
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