JP6574728B2 - Polishing equipment - Google Patents

Description

  The present invention relates to a polishing apparatus for polishing a conical surface such as a pulley for a CVT (belt type continuously variable transmission), and more particularly to a polishing apparatus suitable for polishing a curved conical surface.

  In patent document 1, the technique which grinds the taper surface of a workpiece | work with a rotating grindstone is shown. Patent Document 2 discloses a technique for grinding a CVT sheave surface with a rotating grindstone. Patent Document 3 discloses a technique for polishing a sheave surface by oscillating a polishing film at a high speed in the radial direction of the CVT sheave surface while rotating the CVT sheave surface. On the other hand, Patent Document 4 discloses a technique in which an aspherical surface to be polished of a cathode ray tube panel positioned and placed on a rotary table is polished with a single polishing tool. Further, Patent Document 5 discloses a polishing technique for a workpiece surface having various curvatures such as an aspheric lens, and the like. By the acting force on a polishing member having a polishing surface in contact with the workpiece surface. When polishing is performed by changing the shape of the polishing member, it is shown that processing is performed while changing the shape of the polishing member by controlling the acting force on the polishing member according to the processing elapsed time.

No. 58-128856 Patent No. 4313090 JP 2013-87918 JP 2-172667 A JP2003-48153

  In the polishing or grinding techniques disclosed in Patent Documents 1 to 3, the radial cross section of the conical surface to be polished was a simple straight line. Therefore, it is unsuitable for a complex shape in which the radial cross-sectional shape of the conical surface to be polished is bent or curved. On the other hand, the techniques disclosed in Patent Documents 4 and 5 polish a curved surface, but require complicated apparatuses and processes.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a polishing apparatus capable of polishing a bent or curved conical surface with a simple configuration and man-hours.

  A polishing apparatus according to the present invention is a polishing member for polishing a bent or curved conical surface, the conical surface having a first surface portion and a second surface portion which are different in a radial direction, The polishing surface has a first portion and a second portion having a cross-sectional shape along each cross-sectional shape of the first surface portion and the second surface portion, and a radial direction of the conical surface with respect to the polishing member And a first link member and a second link member that respectively connect movable points corresponding to both ends of the polishing member to a fixed point so as to be swingable in a vibration direction. The first link member connected to a movable point corresponding to one end of the member is installed so that an extension line thereof is substantially orthogonal to the polishing surface of the first portion near one end of the polishing member. Before connecting to the movable point corresponding to the edge The second link member, characterized in that the extension is installed so as to be substantially perpendicular to the polishing surface of the second portion of the other end side of the said abrasive member.

  According to the present invention, the bent or curved conical surface (pulley surface) is grasped by dividing it into two different portions (first surface portion and second surface portion) in the radial direction, and the polishing member is provided on the conical surface. A polishing surface having a first portion and a second portion having a cross-sectional shape along the cross-sectional shape of the first and second surface portions is configured. Therefore, on the polishing surface of the polishing member, the cross-sections of the first part and the second part have a generally bent or curved shape following the bending or bending of the conical surface, and roughly show different inclinations from each other. become. A movable point corresponding to one end of the polishing member is connected to the first link member, and a movable point corresponding to the other end of the polishing member is connected to the second link member, whereby radial vibration ( When the first and second link members are fixed at their fixed points, the other ends (movable points) of the first and second link members are moved together with the polishing member. It will vibrate.

  Here, since the first portion and the second portion of the polishing surface are roughly inclined differently, for example, the vibration direction is substantially the same as the polishing surface of the first portion, and the polishing member is in vibration If the movement of the first surface portion is linear, the polishing surface of the first portion does not move away from the corresponding first surface portion during vibration, so that the first surface portion can be sufficiently polished, but the other second portion can be polished. Since the polishing surface vibrates at an angle with respect to the vibration direction, the probability that the polishing surface of the second part is separated from the corresponding second surface part during vibration increases, and the polishing of the second surface part is insufficient. Become.

  However, according to the present invention, the first link member connected to the movable point corresponding to one end of the polishing member has an extension line of the polishing surface (or extension thereof) of the first portion near one end of the polishing member. Line) and the second link member connected to a movable point corresponding to the other end of the polishing member has an extended line near the other end of the polishing member. Since the polishing member is installed so as to be substantially orthogonal to the polishing surface (or its extension line), the movement of the polishing member during vibration exhibits a non-linear behavior regulated by the link member. Even when swinging closer to the part, the movement is almost along the polishing surface of the first part or the second part. Therefore, sufficient polishing can be performed on both the first and second surface portions. Thus, the first and second surface portions of the conical surface can be collectively polished according to the vibration of the polishing member, so that the bent or curved conical surface (pulley surface) can be polished with a simple configuration and man-hour. Can do.

BRIEF DESCRIPTION OF THE DRAWINGS The axial cross-sectional schematic which shows the outline of the pulley grinding | polishing system with which the grinding | polishing apparatus based on this invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows schematically the specific structure of the grinding | polishing apparatus which concerns on one Example of this invention, (a) is front schematic, (b) is right side schematic. The front schematic diagram of the polish device concerning another example of the present invention. Front schematic view of a polishing apparatus according to yet another embodiment of the present invention.

  FIG. 1 shows the polishing of a conical surface or sheave surface (also referred to as a pulley surface) 21 of a pulley half 20 for a CVT (belt type continuously variable transmission) using a polishing apparatus 10 according to an embodiment of the present invention. It is an axial section schematic diagram showing the outline of the system which performs. In this polishing apparatus 10, a roller-shaped polishing member (described later) equipped with a polishing film (not shown) is pressed against a sheave surface 21 of a pulley half 20 that is a workpiece, and the polishing member is moved in the pulley radial direction ( Polishing is performed by oscillating in the direction of arrow R) in the figure, and so-called oscillation processing is performed. During the oscillation process, the pulley half 20 which is a workpiece is rotated around its rotation axis, and the polishing points are sequentially shifted.

  The sheave surface (conical surface) 21 polished according to the present invention has a bent or curved shape as a whole in the radial direction. In the illustrated example, the sheave surface (conical surface) 21 has a first surface portion 21a near the inner diameter and a second surface portion 21b near the outer diameter, and the first surface portion 21a has a linear cross-sectional shape. The second surface portion 21b has a curved cross-sectional shape.

  2A and 2B are diagrams schematically illustrating a specific configuration of the polishing apparatus 10 according to an embodiment, in which FIG. 2A is a schematic front view, and FIG. 2B is a schematic right side view. The polishing member 11 has a roller shape as a whole, and has a composite roller shape composed of a combination of two portions (first portion 11a and second portion 11b) having different cross-sectional shapes in the roller axial direction. Functions as a polished surface. The first portion 11a of the polishing member 11 has a cross-sectional shape that follows the cross-sectional shape of the first surface portion 21a of the sheave surface 21, and in the example of FIG. Shape). The second portion 11b of the polishing member 11 has a cross-sectional shape along the cross-sectional shape of the second portion 21b of the sheave surface 21, and in the example of FIG. 2 is curved along the curve of the second portion 21b (substantially similarly). It has a curved cross-sectional shape. Thus, when the polishing member 11 is pressed against the sheave surface 21 at the initial vibration position, the first portion 11a of the polishing member 11 is in close contact with the first surface portion 21a of the sheave surface 21, and the second portion of the polishing member 11 11 b can come into close contact with the second portion 21 b of the sheave surface 21.

  As shown in FIG. 2A, the excitation device for oscillation includes an electric motor 13 mounted on a frame 15, an eccentric cam 14 rotated by the motor 13, and a movable block 16. The movable block 16 includes a support frame 16 a that supports the roller shaft 12 of the polishing member 11, and a cam receiver 16 b that opposes the eccentric cam 14. The movable block 16 is configured to be swingably suspended from the lower frame 15a of the frame 15 by a pair of link members 17a and 17b. The eccentric cam 14 connected to the rotating shaft of the electric motor 13 protrudes below the lower frame 15 a of the frame 15 and engages with the cam receiver 16 b of the movable block 16. In response to the rotation of the eccentric cam 14, the cam receiver 16b vibrates in the pulley radial direction (arrow R in the figure), whereby the entire movable block 16 vibrates, and the polishing member 11 supported by the support frame 16a moves in the pulley radial direction. It will vibrate (arrow R in the figure).

  As shown in FIG. 2 (a), the first link member 17 a connects between a fixed point Pfa set on the lower frame 15 a of the frame 15 and a movable point Pma set on the support frame 16 a of the movable block 16. The movable point Pma is connected to the fixed point Pfa so that the movable point Pma can swing in the vibration direction. Similarly, the second link member 17b couples between a fixed point Pfb set on the lower frame 15a of the frame 15 and a movable point Pmb set on the support frame 16a of the movable block 16, and with respect to the fixed point Pfb. Thus, the movable point Pmb is coupled so that it can swing in the vibration direction. Accordingly, the vibration applied to the movable block 16 according to the rotation of the eccentric cam 14 is converted into a swinging motion of the movable points Pma and Pmb defined by the first link member 17a and the second link member 17b. Since the polishing member 11 vibrates integrally with the support frame 16a, the trajectory of the swinging motion of the polishing member 11 during vibration (during oscillation) is equivalent to the trajectory of the swinging motion of the movable points Pma and Pmb. It will be a thing.

  As shown in FIG. 2A, in the initial position, the first link member 17 a connected to the movable point Pma corresponding to one end of the polishing member 11 has an extension line near the one end of the polishing member 11. It is installed so as to be substantially orthogonal to the polishing surface of the portion 11a (that is, the fixed point Pfa and the movable point Pma are set as such). In this example, the first portion 11a has a linear shape parallel to the vibration direction (arrow R), so the first link member 17a extends in a direction substantially perpendicular to the shaft 12 of the polishing member 11. Similarly, in the initial position, the second link member 17b connected to the movable point Pmb corresponding to the other end of the polishing member 11 has an extended line of the polishing surface of the second portion 11b near the other end of the polishing member 11. (That is, the fixed point Pfb and the movable point Pmb are set as such). In the example of FIG. 2A, the second portion 11b is somewhat curved in a concave shape, so that the extension line E representing the polishing surface of the second portion 11b is relative to the roller shaft 12 of the polishing member 11. The second link member 17b, which has an angle θ greater than 0 degree and is set to have an extension line substantially perpendicular thereto, makes an obtuse angle exceeding 90 degrees with respect to the shaft 12 of the polishing member 11. It extends diagonally. Thus, the first link member 17a and the second link member 17b are provided asymmetrically or non-parallel. The extension line E that represents the polished surface of the second portion 11b that is curved in a concave shape may be a simple extension line at the end (left end in the figure) of the second portion 11b, or The average of the angles formed by the tangent lines of the plurality of portions in the second portion 11b with respect to the roller shaft 12 may be used.

  As an example, when viewed from the side, one link member 17a (same for 17b) has a substantially H shape as shown in FIG. 2B, and the frame 15 is fixed at two fixed points Pfa. It is semi-fixed to the lower frame 15a and is semi-fixed to the support frame 16a of the movable block 16 at two movable points Pma. Here, “semi-fixed” means that they are coupled so as to allow the vibration. However, the shape of one link member 17a (same for 17b) is not limited to this, and may be any shape, for example, a single rod.

  At the time of polishing operation, a polishing film (not shown) is interposed between the polishing member 11 and the work (sheave surface 21), and for example, the frame 15 is placed in the direction of the work (arrow x) by pressing means (not shown). The polishing member 11 is vibrated while being pressed strongly to perform polishing by exerting the polishing function of the polishing film.

  In the above configuration, due to the asymmetrical arrangement of the first link member 17a and the second link member 17b, the movement of the polishing member 11 during vibration (oscillation) is restricted by the link members 17a and 17b, and the non-linear behavior. In this case, even when the polishing member 11 is swung toward either end, the movement substantially follows the polishing surface of the first portion 11a or the second portion 11b. For example, when swinging to the left from the initial position shown in FIG. 2 (a), the movable point Pmb at the lower end of the second link member 17b moves somewhat downward, and the polished surface of the second portion 11b is generally representative. The movement along the extension line B is shown. This is because the extension line of the second link member 17b at the initial position is substantially orthogonal to the representative extension line B of the polished surface of the second portion 11b. Thereby, the grinding | polishing surface of the 2nd part 11b of the grinding | polishing member 11 can maintain the close_contact | adherence to the 2nd surface part 21b of the sheave surface 21 corresponding to it. On the other hand, at that time, the movable point Pma at the lower end of the first link member 17a moves substantially laterally, and the polished surface of the first portion 11a can maintain close contact with the first surface portion 21a of the corresponding sheave surface 21. .

  Further, when swinging to the right from the initial position shown in FIG. 2 (a), the movable point Pmb at the lower end of the second link member 17b moves somewhat upward, and the polished surface of the second portion 11b is generally representative thereof. The movement along the general extension line B is shown. Thereby, the grinding | polishing surface of the 2nd part 11b of the grinding | polishing member 11 can maintain the close_contact | adherence to the 2nd surface part 21b of the sheave surface 21 corresponding to it. On the other hand, at that time, the movable point Pma at the lower end of the first link member 17a moves substantially laterally, and the polished surface of the first portion 11a can maintain close contact with the first surface portion 21a of the corresponding sheave surface 21. .

  As described above, both the first link member 17a and the second link member 17b are substantially orthogonal to the polishing surface (or an extension line thereof) of the first portion 11a or the second portion 11b of the corresponding polishing member 11. Therefore, during vibration, the first portion 11a and the second portion 11b of the polishing member 11 have a closeness to the corresponding first surface portion 21a and second surface portion 21b of the sheave surface 21 respectively. It can be maintained to the same extent. Thus, the first surface portion 21a and the second surface portion 21b of the sheave surface 21 can be collectively polished in accordance with the vibration of one polishing member 11, so that the bent or curved conical surface (the sheave surface 21) can be polished. It can be performed with a simple configuration and process.

  As is clear from the above, the shape of the composite roller of the polishing member 11 may be appropriately changed in design so as to conform to the bent or curved shape of the sheave surface 21 to be polished, and the pair of link members 17a, The asymmetry of 17 b may be set as appropriate according to the angle formed by the polishing surfaces of the first portion 11 a and the second portion 11 b of the polishing member 11 with respect to the axis of the roller shaft 12. A modification of the composite roller shape of the polishing member 11 is shown in FIGS.

  The example of FIG. 3 is applied to a sheave surface (not shown) that is a workpiece in which a radial cross section is linearly bent. Therefore, in the example of FIG. 3, the first portion 11c of the polishing member 11 has a linear cross-sectional shape along the linear cross-sectional shape of the first surface portion of the sheave surface (not shown) that is a workpiece, The second portion 11d of the polishing member 11 has a linear cross-sectional shape that follows the linear cross-sectional shape of the second surface portion of the sheave surface (not shown) that is the workpiece. An angle formed by the polishing surface of the first portion 11c of the polishing member 11 with respect to the axis of the roller shaft 12 is denoted by α, and an angle formed by the polishing surface of the second portion 11d of the polishing member 11 with respect to the axis of the roller shaft 12 is defined. Indicated by β. Also in this case, the first link member 17c connected to the movable point Pma corresponding to one end of the polishing member 11 has an extended line that is substantially orthogonal to the polishing surface of the first portion 11c near one end of the polishing member 11. Installed. In this example, since the polishing surface of the first portion 11c is inclined by the angle α with respect to the vibration direction (arrow R), the first link member 17c has an obtuse angle exceeding 90 degrees with respect to the shaft 12 of the polishing member 11. It extends diagonally to make Similarly, since the polishing surface of the second portion 11d is inclined by the angle β with respect to the vibration direction (arrow R), the second link member 17d connected to the movable point Pmb corresponding to the other end of the polishing member 11 is It extends obliquely so as to form an obtuse angle exceeding 90 degrees with respect to the shaft 12 of the polishing member 11. Thus, the first link member 17c and the second link member 17d are provided asymmetrically or non-parallel.

  The example of FIG. 4 is applied to a sheave surface (not shown) that is a workpiece, the radial section of which is curved in a generally convex shape. That is, each of a first surface portion and a second surface portion of a sheave surface (not shown) that is a workpiece has a curved shape. Therefore, in the example of FIG. 4, the first portion 11 e of the polishing member 11 has a concave curved cross-sectional shape along the convex curved cross-sectional shape of the first surface portion of the sheave surface (not shown) that is a workpiece, The second portion 11f of the polishing member 11 has a concave curved cross-sectional shape along the convex curved cross-sectional shape of the second surface portion of the sheave surface (not shown) that is a workpiece. An angle formed by the polishing surface of the first portion 11e with respect to the axis of the roller shaft 12 is denoted by δ, and an angle formed by the polishing surface of the second portion 11d of the polishing member 11 with respect to the axis of the roller shaft 12 is denoted by γ. Also in this case, the first link member 17e connected to the movable point Pma corresponding to one end of the polishing member 11 has an extended line that is substantially perpendicular to the polishing surface of the first portion 11e near one end of the polishing member 11. Installed. In this example, since the representative extension line E of the polishing surface of the first portion 11e is inclined by an angle δ with respect to the vibration direction (arrow R), the first link member 17e is relative to the shaft 12 of the polishing member 11. It extends diagonally so as to make an obtuse angle exceeding 90 degrees. Similarly, since the polishing surface of the second portion 11f is inclined by an angle γ with respect to the vibration direction (arrow R), the second link member 17f connected to the movable point Pmb corresponding to the other end of the polishing member 11 is It extends obliquely so as to form an obtuse angle exceeding 90 degrees with respect to the shaft 12 of the polishing member 11. Thus, the first link member 17e and the second link member 17f are provided asymmetrically or non-parallel.

DESCRIPTION OF SYMBOLS 10 Polishing apparatus 11a, 11c, 11e 1st part 11b, 11d, 11f of grinding | polishing surface 12 Roller shaft 13 Electric motor 14 Eccentric cam 15 Frame 15a Lower frame 16 Movable block 16a Support frame 16b Cam receiving body 17a , 17c, 17e First link members 17b, 17d, 17f Second link member 20 Pulley half body 21 Sheave surface (conical surface)
21a First surface portion 21b Second surface portion Pfa, Pfb Fixed points Pma, Pmb Movable points

Claims (3)

A polishing member for polishing a bent or curved conical surface, wherein the conical surface has a first surface portion and a second surface portion that are different in a radial direction, and the polishing surface of the polishing member is the first surface portion. And the polishing member having a first portion and a second portion having a cross-sectional shape along each cross-sectional shape of the second surface portion, and
An excitation device for applying vibration along the radial direction of the conical surface to the polishing member;
A first link member and a second link member that connect movable points corresponding to both ends of the polishing member with respect to a fixed point so as to be swingable in a vibration direction, respectively, and the movable point corresponding to one end of the polishing member The first link member to be connected is installed so that its extension line is substantially orthogonal to the polishing surface of the first portion near one end of the polishing member, and is connected to a movable point corresponding to the other end of the polishing member. The polishing apparatus, wherein the second link member is installed so that an extension line thereof is substantially orthogonal to the polishing surface of the second portion near the other end of the polishing member.   The first surface portion of the conical surface has a linear cross-sectional shape, the second surface portion has a curved cross-sectional shape, and the first portion of the polishing member has a linear cross-sectional shape, and the second portion The polishing apparatus of claim 1, having a curved cross-sectional shape.   The first surface portion and the second surface portion of the conical surface each have a curved cross-sectional shape, and the first portion and the second portion of the polishing member correspond to the first surface portion and the second surface portion, respectively. The polishing apparatus according to claim 1, having a curved cross-sectional shape.

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