• 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 invention relates to a method of machining a workpiece (1) by means of a grinding machine, comprising the step of rotating and displacing the workpiece along a first axis (4) in the direction of the first grinding wheel; rotating a grinding wheel (6) about a second axis (61) and sliding it along a third axis (62) such that the grinding wheel grinds a peripheral portion (103) of the workpiece, the grinding wheel being positioned in a translating position along the third axis ; and wherein the displacement position is determined as a function of a position and an angular position of the workpiece about the first axis. The invention further relates to a grinding machine for carrying out such a method.
    公开号:CH712809B1
    申请号:CH00027/18
    申请日:2015-07-13
    公开日:2019-07-15
    发明作者:Marty Jean-Charles；Bissat David
    申请人:Rollomatic Sa；
    IPC主号:
    专利说明:

    description
    Field of the Invention The present invention relates to a method and a grinding machine for machining a workpiece, in particular a small workpiece.
    Description of the Prior Art There is a need for reliable and cost effective means for making complex profiled workpieces or tools by machining raw monoblocks.
    Profile grinding machines are frequently used for grinding workpieces with complex profiles having a plurality of straight and / or curved parallel or mutually inclined surfaces or facets, shoulders, depressions, grooves, projections and / or other irregularities. When using a profile grinding machine, the profile to be ground is successively ground during roughing with a roughing tool and then ground in a finishing operation with a finishing grinding tool. When using an optical profile grinder that works with a projection system, the area of the chip is projected in magnification by means of an optical system onto a screen, comparing the silhouette of the workpiece and the chip tool with the drawing of the workpiece laid on tracing paper on the screen can. However, the use of a profile grinding machine (or an optical profile grinding machine) requires permanent monitoring by an expert as well as continuous corrections of the chip parameters to obtain the desired longitudinal and cross sectional shapes, especially during the setup of the grinding process. In addition, such grinders are unsuitable to grind workpieces with longitudinal contours with negative inclinations with respect to the longitudinal direction of the grinding operations.
    Document US 2011 195 635 discloses a grinding machine arranged to hold the ends of a plurality of workpieces to grind their free surfaces through a pair of radially movable grindstones. The grinding stones are dimensioned so that they simultaneously grind the entire longitudinal contour of the workpiece. A rotation of the workpieces in successive predefined angular positions allows the machining of workpieces with non-circular cross sections. Workpieces with conical or rounded longitudinal contours could be shaved by providing the grinder with grindstones having a corresponding complementary grinding profile. However, this grinder can only cylindrically shaped green workpieces with opposite, parallel faces spanen, in particular with a cross-sectional edge of 2-15 mm and a length of 10-80 mm.
    Document DE 10 2008 061 528 discloses a chip method for grinding a plurality of cams in a camshaft. A few different size grindstones are thus arranged in succession before each cam of the camshaft. As the camshaft is rotated, the grindstones are radially moved in response to the angular position of the cam to simultaneously grind the entire longitudinal contour of the cam. However, the disclosed machining method is intended to machine workpieces having only longitudinal contours parallel to the axis of rotation of the workpiece. In addition, the machining method is only suitable for a workpiece having a concave surface with a radius between 35 and 150 mm.
    The document US 5 865 667 discloses a grinding machine arranged to hold and move one end of a workpiece while grinding the free end of the workpiece by a pair of grindstones. As the workpiece is rotated and axially displaced, the grindstones are displaced toward the workpiece, depending on the axial position of the free portion of the workpiece, so that the cross-diameter of the workpiece is varied locally. However, this grinder can only machine round workpieces.
    BRIEF SUMMARY OF THE INVENTION The object of the invention is to provide a grinding machine and a machining method which are (at least partially) freed from the limitations of known grinding machines and machining methods.
    According to the invention, this object is achieved by means of the method of claim 1 and the grinding machine of claim 22.
    An advantage of the present solution is to provide a more reliable and economical machining of workpieces with non-circular cross-sections with respect to the solutions of the prior art. In particular, the present solution provides reliable and economical machining of elongate workpieces having a non-round section with a small cross-section.
    Another advantage of the present solution is to provide a more reliable and more economical machining of workpieces with non-parallel longitudinal contours, in particular with at least one section with a concave longitudinal contour, with respect to the known solutions.
    In addition, this solution provides a reliable and economical cutting of elongated workpieces with a decentralized end portion with a small cross-section compared to grinding machines and clamping method according to the prior art. In particular, the claimed solution provides reliable and economical machining of small, elongate workpieces having a decentralized end or non-circular cross-section having a plurality of concave / convex contours.
    BRIEF DESCRIPTION OF THE DRAWINGS [0012] The invention will be better understood by the description of exemplary embodiments shown by way of example and in the figures, wherein:
    Fig. 1 shows a view of a grinding machine according to the invention;
    Fig. 2 is a detailed illustration of parts of the grinding machine of Fig. 1;
    3 is a flowchart of a first embodiment of a method of machining a workpiece according to the invention;
    Fig. 4 is a flowchart of a second embodiment of a method of machining a workpiece according to the invention;
    Fig. 5 illustrates a relationship between the movements of the workpiece and the grinding wheel (s) according to the invention;
    Fig. 6 shows a variant of the relationship between the movements of the workpiece and the grinding wheel (s) according to the invention; and Figures 7-14 show some examples of workpieces that could be advantageously realized with the grinding machine and method of the invention.
    Detailed Description of Possible Embodiments of the Invention Figs. 1 and 2 show a grinding machine for machining a workpiece 1 according to the invention. The grinding machine has a spindle 3 which is arranged to engage an end 101 of the workpiece 1, so that the workpiece 1 can be rotated about a first axis 4 and displaced when it is detected by the spindle 3. The spindle 3 may be a rotatable spindle arranged to rotate about the first axis 4. The spindle can thus be mounted on a headstock 9, which is movable relative to a frame 2 of the grinding machine along the first axis 4.
    The workpiece 1 may be a crude, cylindrically shaped monobloc of any sandable material, including, for example, a metal, alloy or ceramic.
    The grinding machine further comprises a guide post 5 which is spaced distally from the spindle 3 along the first axis 4. The guide post 5 provides a sliding support of the other end 102 of the workpiece 1, i. the guide post is arranged to prevent substantially radial movement of the other end 102 with respect to the first axis 4. The guide support 5 can be attached directly to the frame 2 of the grinding machine. The spindle 3, the headstock 9 and / or the guide support 5 may be equipped with alignment means which allow manual, semi-automatic or fully automatic alignment of such components along the first axis.
    The grinding machine further comprises a first grinding wheel 6, which is arranged to rotate about a second axis 61 and to move along a third axis 62 obliquely or perpendicular to the second axis 61, to a peripheral portion 103 of the workpiece 1 to grind.
    The grinding wheel may be any type of disc or cylindrical tool having an operative grinding profile intended to be used to machine a surface of a workpiece, e.g. a round cut stone or a grindstone.
    In one embodiment, the grinding machine further comprises a second grinding wheel 7 arranged to rotate about a fourth axis 71 and to shift along a fifth axis 72 obliquely or perpendicularly to the fourth axis 71, around a peripheral portion of the workpiece 1 to grind.
    The first and second grinding wheels 6, 7 have a grinding profile 63, 73, i. a radial portion of the grinding wheel 6, 7 suitable for machining a surface of a workpiece, having a first rounded portion 631, 731 and a second substantially flat portion 632, 732.
    Depending on the type of chipping, the first and second grinding wheels 6, 7 may have the same dimensions or different dimensions (such as size, rounded portions, flat portions, etc.). In addition, the first and second abrasive wheels 6, 7 may have the same or different abrasive features (such as abrasive materials, surface treatments, etc.).
    In a preferred embodiment, the grinding machine is a numerically controlled grinding machine (CNC grinding machine). The grinding machine may thus include a programmable digital control device 10 to enable semi-automatic and / or fully automatic machining of the workpiece. The apparatus 10 may be arranged to detect and process machining specifications or digital models of workpieces to drive and control operations and movements of the various components of the grinding machine, particularly the displacement and rotation of the workpiece 1 and the displacement of the first and second workpieces second grinding wheel 6, 7.
    According to an embodiment schematically illustrated in FIG. 3, a method of machining the workpiece 1 using the grinding machine includes a step (S1 in FIG. 3) of grasping an end 101 of the workpiece 1 in the spindle 3 so that the other end 102 of the workpiece is supported in the guide post 5.
    The method further comprises the step of positioning the workpiece 1 in a predetermined position (S2). The predetermined position may be defined with respect to the frame 2, the guide post 5, and / or with respect to the grinder's 3D coordinate system. The support guide 5 can be used as the center of this coordinate system. The step of positioning (S2) may include a displacement and / or a rotation of the workpiece 2 along the first / around the first axis 4, for example by means of the spindle 3 and / or the headstock 9.
    The method may further comprise a step (S10) of positioning the first grinding wheel 6 in a predetermined position with respect to the frame 2, the guide support 5 and / or with respect to an SD coordinate system of the grinding machine. Advantageously, the grinding profile 63 of the first grinding wheel 6 is operatively positioned as close as possible to the guide support 5, so as to be able to machine that part of the workpiece 1 which extends from the guide support 5 in a direction substantially opposite to the spindle 3. The step (S10) of positioning the first grinding wheel 6 in a predetermined position may be performed simultaneously, before or after the step (S2) of positioning the workpiece.
    In a further step (S3), the workpiece 1 is rotated by the spindle 3 and optionally moved in displacement along the first axis 4 in the direction of the guide support 5. The displacement movement will cause the workpiece to move further away from the guide post 5. The workpiece 1 can be rotated at a predetermined rotational speed or at a variable rotational speed. The displacement movement may also be performed at a predefined displacement speed or at a variable displacement speed.
    In a further step (S11), the first grinding wheel 6 is rotated about the second axis 61 and possibly moved translationally along the third axis 62 to grind (grind) a peripheral portion 103 of the workpiece 1 extending from the guide post 5 and comes into contact with the first grinding wheel 6.
    In one embodiment, the sliding movement of the first grinding wheel 6 is performed in the sequential positioning of the first grinding wheel along the third axis 62 (S12). Each position of the first grinding wheel 6 can then be determined depending on a position of the workpiece 1 along the first axis 4 and an angular position of the workpiece 1 about the first axis 4 (S13).
    In a preferred embodiment, shown in Fig. 4, the grinding machine comprises the second grinding wheel 7, and the method further comprises a step (S21) of rotating the second grinding wheel 7 about the fourth axis 71 and possibly the translational movement along the fifth axis 72 to grasp (grind) a peripheral portion 103 of the workpiece 1, which moves away from the guide post 5 and comes into contact with the second grinding wheel 7.
    The method may further comprise a step (S20) of positioning the second grinding wheel 7 in a predetermined position with respect to the frame 2, the guide support 5 and / or with respect to an SD coordinate system of the grinding machine. Advantageously, the grinding profile 73 of the second grinding wheel 7 is operatively arranged as close as possible to the guide support 5 in order to be able to machine that portion of the workpiece 1 which moves away from the guide support 5 in a direction substantially opposite to the spindle 3. The step (S20) of positioning the second grinding wheel 7 in a predetermined position may be performed simultaneously, before or after the step (S2) of positioning the workpiece.
    In one embodiment, the sliding movement of the second grinding wheel 7 is performed in the sequential positioning of the second grinding wheel 7 along the fifth axis 72 (S22). Each position of the second grinding wheel 7 can then be determined depending on a position of the workpiece 1 along the first axis 4 and an angular position of the workpiece 1 about the first axis 4 (S23).
    The turning and shifting of the second grinding wheel 7 (S21) can be carried out simultaneously with the turning and shifting of the workpiece (S3) and with the turning and shifting of the first grinding wheel 6 (S11).
    Each position of the second grinding wheel 7 (step S23) may be determined as a function of a position of the workpiece 1 along the first axis 4 and an angular position of the workpiece 1 about the first axis 4.
    Depending on the typology of the cutting operation, the first grinding wheel 6 and the second grinding wheel 7 may be arranged so as to grind substantially the same peripheral portion 103 of the workpiece 1 at two different surface portions 105, 106. In addition, the grinding wheels 6, 7 may be further arranged to work simultaneously on the same peripheral portion 103.
    Advantageously, the position of the workpiece 1 used for determining a position of the first grinding wheel 6 (S13) is the same position of the workpiece 1 used for determining a position of the second grinding wheel 7 (S23).
    The position of the workpiece 1 used to determine a position of the first and / or second grinding wheel 6, 7 may be a relative position of the workpiece 1 along the first axis 4 with respect to the stand 2, the guide support 5, the first and or second grinding wheel 6, 7 and / or with respect to the 3D coordinate system of the grinding machine.
    The position of the workpiece 1 used for determining a position of the first and / or second grinding wheel 6, 7 can also be determined by a position of the spindle 3 and / or the headstock 9 along the first axis 4.
    The position of the workpiece 1 used to determine a position of the first and / or second grinding wheels 6, 7 may be a position of the workpiece 1 at the time of determining a next positioning of the first and second grinding wheels 6, 7.
    Alternatively, the position of the workpiece 1 used to determine a position of the first and / or second grinding wheels 6, 7 may be a position of the workpiece 1 that is estimated (eg, calculated by a program executed by the programmable digital controller 10) a time when a next shift of the first and / or second grinding wheel 6, 7 planned or executed.
    Fig. 5 shows some details of a preferred embodiment of the method. In this embodiment, the determination of the next positioning of the first and / or second grinding wheel 6, 7 (step S13 and / or 23) is a function of the predetermined or variable displacement speed of the workpiece 1. The determination of the next positioning of the first and / or second grinding wheel 6, 7 may for example take into account a speed value at the time of the determination of the next positioning, an estimated speed value at the time of the planned next shift of the first and / or second grinding wheel 6, 7 and / or an interpolation of these speed values.
    The displacement speed of the workpiece 1 for determining a position of the first and / or second grinding wheels 6, 7 (S13, S23) may be a relative speed of the workpiece 1 along said first axis 4 with respect to the stand 2 Guide post 5, the first and / or second grinding wheel 6,7 and / or with respect to the 3D coordinate system of the grinding machine.
    The displacement speed of the workpiece 1 used for the determination of a position of the first and / or the second grinding wheel 6, 7 can also be estimated by a displacement speed of the spindle 3 and / or the headstock 9 along the first axis 4 (eg calculated by a program executed by the programmable digital controller 10).
    The angular position of the workpiece 1 used for determining a position of the first grinding wheel 6 may be the same as the angular position of the workpiece 1 used for determining a position of the second grinding wheel 7 (S23).
    The angular position of the workpiece 1 used for determining a position of the first and / or second grinding wheels 6, 7 may be an angular position of the workpiece 1 at the time of determining a next position of the first and / or second grinding wheels 6 Be 7.
    Alternatively, the angular position of the workpiece 1 used to determine a position of the first and / or second grinding wheels 6, 7 may be an estimated angular position (eg calculated by a program executed by the programmable digital controller 10) of the workpiece 1 at a time at which a next shift of the first and / or the second grinding wheel 6, 7 is planned or executed.
    The angular position used to determine a position of the first and / or second grinding wheels 6, 7 may be a relative angular position of the workpiece 1 with respect to the frame 2, the guide post 5, the first and / or second grinding wheels 6, 7 and / or with respect to the 3D coordinate system of the grinding machine.
    The angular position of the workpiece 1 used to determine a position of the first and / or second grinding wheel can be derived or possibly replaced by an angular position of the spindle 3 about the first axis 4.
    Advantageously, the determination of the next position of the first and / or second grinding wheel 6, 7 (S13, S23) may be a function of the predetermined or variable angular velocity of the workpiece 1, as shown in FIG.
    The determination of the next position of the first and / or second grinding wheel 6, 7 may, for example, an angular velocity value at the time of determination of the next position, an estimated angular velocity value at the time of planned next shift of the first and / or second grinding wheel and / or a Consider the interpolation of these angular velocity values.
    Fig. 6 shows a particularly advantageous embodiment of the method. In this embodiment, in order to take into consideration technical and physical limitations of the grinding machine components, the workpiece material, and the size and / or the typology of the machining operation, the step of determining the next position of the first and / or the second grinding wheel 6,7 (S13, S23) a step of selecting a displacement speed I05 and / or a variable angular velocity I06 of the workpiece 1. The displacement speed and / or a variable angular velocity of the workpiece 1 are then modified according to the selected displacement and / or rotation speed (steps S8 and S9).
    Preferably, during the step S3, the workpiece 1 is displaced along the first axis 4 in the direction of the guide post 5 until the entire section of the workpiece 1 to be cut protrudes completely from the guide post 5. The machined workpiece 1 could then be removed from the spindle 5 or cut by the first and / or second grinding wheels 6, 7 or by a special cutting tool of the grinding machine.
    Embodiments of elongate workpieces 1 (ie, longitudinal to aspect ratios typically greater than 100 and even 500) with non-round and / or non-parallel longitudinal contours by known grinding machines and / or methods are known to be at risk of bending or even breaking free section of the workpiece. The bending or breaking of the workpiece is caused by a lever effect caused by the contact of the grinding wheel (s) with a free end portion of the workpiece. The risk of bending or even fracturing a free portion of the workpiece is further enhanced in the case of chipping a workpiece having at least a portion of small cross-section (e.g., a diameter that is typically less than 1 mm).
    In particular, by grinding a peripheral portion of the workpiece 1 away from the guide post (literally, extending away from the guide post), the proposed solution allows for the risk of workpiece bending / breakage during machining Therefore, which allows a more economical and efficient realization of such workpieces, in particular workpieces with one or a plurality of profiles with small diameter in relation to the prior art.
    In order to further reduce the risk of bending or breaking a workpiece, moreover, the first and second grinding wheels 6, 7 may be arranged to rotate in the same direction of rotation and to translate substantially along the same axis 8 (ie, the third and fifth axes 62, 72 are substantially coaxial), said axis 8 being substantially perpendicular to the first axis 4 (Figure 2). The first and second grinding wheels 6, 7 may also be arranged to rotate in the opposite directions of rotation.
    In addition, then the first and the second grinding wheel 6, 7 can be arranged so that the workpiece 1 is simultaneously and continuously braced as close as possible to the guide support 5. This solution makes it possible to limit the maximum axial distance between each of the two contact sections 105, 106 along the first axis 4 during the entire chip process. This results in a concentration of the physical forces exerted on the workpiece 1 by the grinding wheels 6, 7 in a small portion of the peripheral portion 103 of the workpiece 1, as well as a compensation of the resulting radial vector component of the sum of these physical forces.
    The method disclosed herein also makes it possible to limit the maximum axial distances between the guide support 5 and each of these sections 105, 106 along the first axis 4 during the entire clamping process. This leads to a limitation of the maximum distance between the guide support 5 (which acts as a fulcrum of the lever) and the respective points of attack of the grinding forces of the grinding wheels 6, 7.
    The method disclosed herein can further reduce the leverage effect caused by the grinding wheels throughout the grinding process, enabling reliable machining of small, elongated workpieces having one or more sections with small cross-sections.
    Advantageously, the workpiece 1 is moved along the first axis 4 only in the direction of the guide support 5 during the clamping operation. The workpiece 1 is thus processed in a pass-through mode, i. in a continuous process. The method additionally reduces the chip time relative to the bi-directional pass-through mode.
    In a preferred embodiment, the workpiece 1 is displaced along the first axis 4 in a continuous manner along the entire Spanens in the direction of the guide support 5.
    The risk of bending or even breaking a part of the workpiece 1 is thus further reduced, in particular an already partially reamed part of the workpiece, resulting in an even more reliable machining of small, elongate workpieces with one or more sections with small cross sections allows.
    The method provides reliable machining of small, elongated workpieces 1, with completely decentralized portions (ie, portions whose cross-sections are not in contact with the longitudinal center axis of the workpiece 1 to be ground), as is the case with most non-cylindrical tools with reference to prior art methods.
    Advantageously, the grinding machine and method disclosed herein may additionally be arranged so that only the rounded portions 631, 731 of the abrasive profile 63, 73 are arranged to contact the workpiece 1, around the contact portions 105, 106 on small and substantially point-shaped contact portions 105, 106 limit. The radius of said rounded portion 631, 731 may be zero (sharp edge) or have any suitable value.
    The grinding wheels could be arranged so that the flat portions 632, 732 are inclined with respect to the first axis 4 to avoid undesirable contact with the already-shaved portion of the workpiece. The flat portions 632, 732 may form a 90 ° angle or any suitable angle with the first axis 4.
    An advantage of the present method is to provide not only a simple cutting of the positive inclined longitudinal contour with respect to the direction of grinding (ie the axial direction from the guide post 5 in the direction of the spindle 3), but also a simple one To provide cutting of negatively inclined longitudinal contour with respect to the chip direction.
    The present method thus provides reliable machining of convex portions and concave portions of longitudinal contours of the workpieces.
    Figures 7 to 12 show examples of workpieces 1 made using the present grinding machine and method, the reference 108 indicating the axis of rotation of the workpiece during machining. The workpieces can be manufactured more economically and reliably compared to known grinding machines and methods.
    In particular, Fig. 7 shows an example of a workpiece 1 having an end piece with a polygonal cross-section, i. a polygonal tail with 20 faces.
    Figs. 8 to 10 show other examples of ground workpieces 1 comprising an elongate, single, non-centered portion. The sections may have non-round cross-sections, for example a rounded rectangular cross section (FIG. 8), a square cross section (FIG. 9) or a triangular cross section (FIG. 10). In addition, such a section may have a small dimension (for example a cross-section of less than 0.1 mm) and important length-to-cross-section ratios, for example greater than 100 (see FIG. 8).
    In contrast to the use of known methods, the present method makes it possible to produce a ground workpiece 1 with sections completely outside the center, as shown in FIGS. 8 and 9.
    Figs. 11 to 13 show examples of ground workpieces 1 comprising a plurality of decentralized end parts.
    The decentralized portions may have small, non-circular cross-sections, as shown in Figs. 11 and 12.
    An advantage of the method disclosed herein is that there is no dimensional restriction in the workpieces to be cut. For example, a workpiece that is machined with an aspect ratio of about 100 may have dimensions in the range of 0.1 mm or in the range of 10 mm or 100 mm, and so on.
    The profiles of such ground workpieces 1 may have portions with non-parallel longitudinal contours, for example, rounded or oblique contours relative to the longitudinal axis of the (unprocessed) workpiece 1, as represented by the workpiece of FIG.
    In contrast to known methods, the method of the invention makes it possible to produce workpieces which combine non-round sections with convex and concave longitudinal contours, as shown in FIG.
    The method of the invention can produce the ground workpieces faster and more economically and reliably.
    Numbered parts 1 Workpiece 101 A first end of the workpiece 102 A second end of the workpiece 103 A peripheral portion of the workpiece 105 Contact surface portion with 1st grinding wheel 106 Contact surface portion with 2nd grinding wheel 108 Machining rotation axis 2 Frame of a grinding machine 3 Spindle 4 Rotation and displacement axis 5 Guide support 6 1. Grinding wheel 61 Rotation axis of 1st grinding wheel 62 Shifting axis of 1st grinding wheel 63 Grinding profile of 1st grinding wheel 631 Rounded section 632 Flat section 7 2nd grinding wheel 71 Rotational axis of 2nd grinding wheel 72 Displacement axis of 2nd grinding wheel 73 Abrasive profile of 2nd grinding wheel Grinding wheel 731 Rounded section 732 Flat section 8 Common grinding axis 9 Headstock 10 Digital control device 51 Step of gripping the workpiece 52 Step of positioning the workpiece in a predetermined position 53 Step of rotating and shifting the workpiece 54 Step of determining a position of the workpiece 55 Step of determining an angular position of the workpiece 56 Step of selecting a displacement speed of the workpiece 57 Step of selecting a rotational speed of the workpiece 58 Step of varying a displacement speed of the workpiece 59 Step of varying a rotational speed of the workpiece 510 Step of Positioning of a 1st grinding wheel in a predetermined position 511 Step of rotating and shifting the 1st grinding wheel 512 Step of shifting the 1st grinding wheel into successive positions 513 Step of determining a sliding position of the 1st grinding wheel S20 Step of positioning a 2nd grinding wheel in one predetermined position 521 Step of rotating and shifting the 2nd grinding wheel 522 Step of moving the 2nd grinding wheel into positions 523 Step of determining a sliding position of the 2nd grinding wheel 1 01 Position of the workpiece 102 Angle position of the workpiece 103 Displacement speed of the workpiece 104 Speed of the workpiece 105 Selected displacement speed value 106 Selected speed value
    权利要求:
    Claims (22)
    [1]
    A method of machining a workpiece (1) by a grinding machine comprising a spindle (3) arranged to rotate and move the workpiece (1) about a first axis (4) along said first axis (4), and a first grinding wheel (6) arranged to rotate about a second axis (61) and to shift along a third axis (62) obliquely or perpendicularly to the second axis (61) about a peripheral portion of the workpiece (1) to chip; the method comprising the step of: rotating the workpiece (1) about the first axis (4) and moving the workpiece (1) along the first axis (4) toward the first grinding wheel (6); Rotating the first grinding wheel (6) about the second axis (61) and sliding the first grinding wheel (6) along the third axis (62) so that the first grinding wheel (6) forms a peripheral portion (103) of the workpiece (1); wherein the first grinding wheel (6) is displaced along the third axis (62); and wherein a shift position of the first abrasive wheel (6) along the third axis (62) is determined as a function of: a position of the workpiece (1) along the first axis (4) and an angular position of the workpiece (1) about the first axis ,
    [2]
    A method according to the preceding claim, wherein the grinding machine further comprises a second grinding wheel (7) arranged to rotate about a fourth axis (71) and inclined along a fifth axis (72) or perpendicular to the fourth axis (72). 71) for cutting a peripheral portion of the workpiece (1); the method further comprising the step of: rotating the second abrasive wheel (7) about the fourth axis (71) and sliding the second abrasive wheel (7) along the fifth axis (72) such that the second abrasive wheel (7) has a peripheral portion the workpiece (1) spant; wherein the second grinding wheel (7) is displaced along the fifth axis (72); and wherein a shift position of the second abrasive wheel (7) along the fifth axis (72) is determined as a function of: a position of the workpiece (1) along the first axis (4) and an angular position of the workpiece (1) about the first axis (4).
    [3]
    A method according to the preceding claim 2, wherein said first grinding wheel (6) and said second grinding wheel (7) are arranged to span substantially the same peripheral portion (103) of the workpiece (1).
    [4]
    A method according to any one of claims 2 or 3, wherein the position of the workpiece used for determining the displacement position of the first grinding wheel (6) along the third axis (62) is the same as the position of the workpiece (1) for determination the displacement position of the second grinding wheel (7) along the fifth axis (72).
    [5]
    5. A method according to any one of claims 2 to 4, wherein the angular position of the workpiece (1) used to determine the displacement position of the first grinding wheel (6) along the third axis (62) is the same as the angular position of the workpiece used, to determine the displacement position of the second grinding wheel (7) along the fifth axis (72).
    [6]
    A method according to any one of claims 2 to 5, wherein said first grinding wheel (6) and said second grinding wheel (7) are arranged so that the third (62) and fifth axes (72) are substantially coaxial.
    [7]
    A method according to any one of claims 2 to 6, wherein said first grinding wheel (6) and said second grinding wheel (7) are arranged so that the second (61) and fourth axes (62) are substantially parallel to the first one Axis (4) are.
    [8]
    8. The method according to any one of the preceding claims, wherein the workpiece (1) is moved continuously along the first axis (4).
    [9]
    A method according to the preceding claim, wherein the workpiece (1) is displaced along the first axis (4) at a predefined displacement speed.
    [10]
    10. The method according to any one of claims 1 to 7, wherein the workpiece (1) with a variable displacement speed along the first axis (4) is moved.
    [11]
    11. The method according to claim 9 or 10, wherein the displacement position of the first grinding wheel (6) and / or the displacement position of the second grinding wheel (7) also in dependence on the displacement speed of the workpiece (1) is determined.
    [12]
    12. The method according to claim 11, wherein the determination of the displacement position of the first grinding wheel (6) and / or the second grinding wheel (7) comprises a step of selecting a displacement speed of the workpiece (1).
    [13]
    13. The method according to any one of the preceding claims, wherein the workpiece (1) is rotated at a predetermined speed along the first axis (4).
    [14]
    14. The method according to any one of claims 1 to 12, wherein the workpiece (1) is rotated at a variable speed about the first axis (4).
    [15]
    15. The method according to any one of claims 13 to 14, wherein the displacement position of the first grinding wheel (6) and / or the displacement position of the second grinding wheel (7) is also determined as a function of the rotational speed.
    [16]
    16. The method according to claim 15, wherein a determination of a shift position of the first grinding wheel (6) and / or the second grinding wheel (7) comprises a step of selecting a rotational speed of the workpiece (1).
    [17]
    A method according to any one of the preceding claims, wherein the third (62) and / or the fifth axis (72) are substantially perpendicular with respect to the first axis (4).
    [18]
    18. Method according to one of the preceding claims 2 to 17, wherein the first grinding wheel (6) is displaced in successive displaced positions along the third axis (62) and / or the second grinding wheel (7) is displaced in successive displacement positions along the fifth axis (72). is postponed; wherein each shift position of the first grinding wheel (6) and / or the second grinding wheel (7) is determined as a function of: a position of the workpiece (1) along the first axis (4), and an angular position of the workpiece (1) about first axis (4).
    [19]
    A method according to any one of the preceding claims, wherein the grinding machine further comprises a guide post (5) spaced from said spindle along the first axis (4) and arranged to slidably support the other end of the workpiece (1).
    [20]
    A method according to claim 19, wherein the first grinding wheel (6) and / or the second grinding wheel (7) are arranged to span a peripheral portion (103) of the workpiece (1) which moves away from said guide support (5) ,
    [21]
    21. The method according to claim 19 or 20, wherein the workpiece (1) along the first axis (4) in the direction of the guide support (5) is moved until the entire section to be cut of the workpiece (1) of the first and / or second grinding wheel (6, 7) protrudes.
    [22]
    A grinding machine for machining a workpiece (1) comprising: a spindle (3) arranged to rotate and displace the workpiece (1) about a first axis (4) along said first axis (4), and a first one A grinding wheel (6) arranged to rotate about a second axis (61) and to slide along a third axis (62) obliquely or perpendicularly to the second axis (61) to form a peripheral portion of the workpiece (1) to chip; wherein the grinding machine is configured to translate the first grinding wheel (6) along the third axis (62) to determine a sliding position of the first grinding wheel (6) along the third axis (62) as a function of: a position of the workpiece (1) along the first axis (4) and an angular position of the workpiece (1) about the first axis.
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    同族专利:
    公开号 | 公开日
    EP3322557A1|2018-05-23|
    JP2018524187A|2018-08-30|
    CN107750197A|2018-03-02|
    CN107750197B|2020-10-30|
    US20170182613A1|2017-06-29|
    KR20180029972A|2018-03-21|
    TW201701998A|2017-01-16|
    TWI664053B|2019-07-01|
    US10207382B2|2019-02-19|
    WO2017008836A1|2017-01-19|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/EP2015/065974|WO2017008836A1|2015-07-13|2015-07-13|Grinding machine and method for machining a workpiece|
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