Grinding device

Abstract

This grinding device is provided with: a reference member that is provided on a drive shaft and supports a reference surface formed on one end side of a workpiece; and a pressing member that is provided on a driven shaft and supports the other end side surface of the workpiece so as to sandwich the workpiece between itself and the reference member. The pressing member includes a first member attached to the other end side surface, and a second member pressing a first pressing member to the other end side surface. The first member is attached to the second member so as to be tiltable with respect to the drive shaft.　

Description

Grinding Equipment

[0001] The present invention relates to a grinding device.

[0002] Patent Document 1 discloses the configuration of a grinding device in which one end face of a ground workpiece is pressed against an end face member and attracted to an electromagnetic chuck, and the other end face of the workpiece is provided with a center hole into which the tip of a tailstock center fits.

[0003] JP 2010-158757 A

[0004] However, if the surface at the other end of the workpiece is inclined relative to the reference surface at one end of the workpiece, the axial center of the workpiece will tilt, making it impossible to properly support the workpiece for rotation, and it may not be possible to obtain appropriate shape accuracy through grinding.

[0005] An object of the present invention is to provide a grinding device that can obtain appropriate shape accuracy through grinding even when the surface on the other end of the workpiece is inclined with respect to a reference surface on one end of the workpiece.

[0006] A grinding apparatus according to one aspect of the present invention includes a reference member provided on a drive shaft and supporting a reference surface formed on one end of a workpiece, and a pressing member provided on a driven shaft and supporting a side surface of the other end of the workpiece so as to be able to clamp the workpiece between the reference member and the workpiece. The pressing member includes a first member attached to the side surface of the other end and a second member pressing the first pressing member against the side surface of the other end. The first member is attached to the second member so as to be tiltable relative to the drive shaft.

[0007] According to the above structure, even when the surface on the other end side of the workpiece is inclined with respect to the reference surface on one end side of the workpiece, it is possible to obtain appropriate shape accuracy by grinding.

[0008] Fig. 1 is a side view showing the structure of a grinding device according to an embodiment, and Fig. 2 is a side view showing the structure of a grinding device according to a modified example.

[0009] Hereinafter, a grinding device 1 according to an embodiment will be described with reference to the drawings. Components having the same functions as those already described will be denoted by the same reference numerals, and description thereof will be omitted.

[0010] The grinding device 1 includes a reference member 11 provided on the drive shaft and a press member 21 provided on the driven shaft (see FIG. 1). The reference member 11 supports a reference surface W1 formed on one end side of the workpiece W. The press member 21 supports a side surface W2 on the other end of the workpiece W, so that the workpiece W can be clamped between the reference member 11 and the press member 21.

[0011] The grinding device 1 can perform grinding by bringing the grinding surface of a rotating grinding wheel S into contact with the side surface of a rotating workpiece W (see FIG. 1). The grinding device 1 according to the embodiment performs grinding by tilting the grinding surface of the grinding wheel S relative to the upper side surface of the workpiece W, and is also called an angular grinding machine.

[0012] A rotatably mounted drive shaft is provided at one end of the grinding device 1. A rotatably mounted driven shaft is provided at the other end of the grinding device 1. A workpiece W is sandwiched and positioned between the drive shaft and the driven shaft (see FIG. 1). The drive shaft is rotated, for example, by a motor. The driven shaft can rotate in conjunction with the drive shaft. Note that in FIG. 1, the drive shaft and the driven shaft are omitted from the drawing, and only a drive plate 2 installed at the tip of the drive shaft and a driven plate 3 installed at the tip of the driven shaft are shown.

[0013] As illustrated in FIG. 1 , a support base 4 is provided at the tip of a drive plate 2 installed at the tip of the drive shaft. The support base 4 has an end face 5 that supports a reference surface W1 formed on the drive shaft side, which is one end side of the workpiece W. A reference member 11 that supports the reference surface W1 of the workpiece W is provided on the end face 5. As illustrated in FIG. 1 , in the embodiment, the reference member 11 is formed as a pin that protrudes from the end face 5 toward the reference surface W1 of the workpiece W. The multiple pins that make up the reference member 11 abut against the tooth surface that is the reference surface W1 of the workpiece W to support it. The shape, arrangement, and number of the reference members 11 and the configuration of the reference surface W1 of the workpiece W are not limited to those described above.

[0014] A driven plate 3 is installed at the tip of the driven shaft (see FIG. 1). A pressing member 21 is provided on the driven plate 3. The pressing member 21 supports the other end side surface W2 of the workpiece W and is configured to be able to clamp the workpiece W between itself and the reference member 11. The pressing member 21 includes a first member 31 and a second member 41 (see FIG. 1). The drive plate 2, support base 4, pressing member 21, driven plate 3, etc. may be configured as an attachment that can be easily attached to and detached from the grinding device 1.

[0015] As illustrated in FIG. 1 , the first member 31 is disposed and attached to the pressing member 21 at a portion facing the other-end side surface W2 of the workpiece W. The first member 31 has an end surface 31A that supports the other-end side surface W2 of the workpiece W. The second member 41 is disposed closer to the base end of the driven shaft (toward the driven plate 3) than the first member 31 and is in contact with the end surface 31B of the first member 31 on the base end side of the driven shaft. In other words, the second member 41 can press the first member 31 against the other-end side surface W2 of the workpiece W. The first member 31 is attached to the second member 41 so as to be tiltable relative to the drive shaft (see FIG. 1 ). Therefore, if the other-end side surface W2 of the workpiece W is tilted relative to the reference plane W1 of the workpiece W, the first member 31 can tilt in accordance with that tilt. In other words, in this case, the first member 31 is disposed in an inclined position relative to the axial center C of the drive shaft (see FIG. 1 ). In other words, if the holding member is not tiltable relative to the drive shaft, and the other end side surface W2 of the workpiece W is tilted relative to the reference plane W1 of the workpiece W, the holding member will follow the other end side surface W2 of the workpiece W. As a result, the axial center of the workpiece W will be tilted relative to the axial center C of the drive shaft. Therefore, the workpiece W cannot be properly rotatably supported, and appropriate shape accuracy may not be obtained.

[0016] As illustrated in FIG. 1 , the end surface 31B of the first member 31 according to the embodiment has an outer edge portion 32, which is an end portion formed in a ring shape. A convex curved surface 33 is formed on the inner edge of the outer edge portion 32 (see FIG. 1 ). The end surface 41A of the second member 41, which faces the first member 31, also has an outer edge portion 42, which is an end portion formed in a ring shape. A tapered surface 43 is formed on a portion of the side surface of the outer edge portion 42. The tapered surface 43 is formed with its smallest diameter near the tip of the end surface 41A and gradually increases in diameter as it moves from the tip of the end surface 41A toward the base end of the driven shaft (see FIG. 1 ). The curved surface 33 of the first member 31 and the tapered surface 43 of the second member 41 are arranged in contact with each other. Therefore, even if the other end side surface W2 of the workpiece W is inclined relative to the reference plane W1 of the workpiece W, the curved surface 33 can tilt relative to the tapered surface 43 in accordance with the inclination. That is, the curved surface 33 and the tapered surface 43 are in linear contact with each other, so that the inclination of the other end side surface W2 of the workpiece W can be absorbed, and the workpiece W can be properly supported so as to be rotatable.

[0017] As a modified example, as illustrated in FIG. 2 , the outer edge 32, which is the end of the first member 31, may have a concave curved surface 34 formed as the end surface 31B. The outer edge 42, which is the end of the second member 41, may have a convex spherical surface 44 formed as the end surface 41A. The curved surface 34 of the first member 31 may receive the spherical surface 44 of the second member 41 and be arranged in contact with each other (see FIG. 2 ). Therefore, even if the other end side surface W2 of the workpiece W is inclined with respect to the reference plane W1 of the workpiece W, the curved surface 34 can tilt relative to the spherical surface 44 in accordance with the inclination. In other words, the curved surface 34 and the spherical surface 44 come into planar contact with each other, thereby absorbing the inclination of the other end side surface W2 of the workpiece W.

[0018] As another modification, a tapered surface may be formed on the inner edge of the outer edge portion 32, which is the annular end portion of the first member 31. That is, the tapered surface may be formed such that the diameter is largest near the tip of the outer edge portion 32 and gradually decreases as the diameter moves from the tip of the outer edge portion 32 toward the base end of the drive shaft (toward the drive plate 2). In this case, the outer edge portion 42, which is the annular end portion of the second member 41, may be formed with a convex curved surface, and the tapered surface of the first member 31 and the curved surface of the second member 41 may be arranged in contact with each other. As a further modification, the outer edge portion 32 of the first member 31 may be formed with a convex spherical surface, and the outer edge portion 42 of the second member 41 may be formed with a concave curved surface, and the spherical surface of the first member 31 and the curved surface of the second member 41 may be arranged in contact with each other.

[0019] (1) The grinding apparatus 1 according to the embodiment includes a reference member 11 that is provided on a drive shaft and supports a reference surface W1 formed on one end of the workpiece W, and a presser member 21 that is provided on a driven shaft and supports a side surface W2 of the other end of the workpiece W so as to be able to clamp the workpiece W between the reference member 11 and the presser member 21. The presser member 21 includes a first member 31 that is attached to the side surface W2 of the other end, and a second member 41 that presses the first member 31 against the side surface W2 of the other end. The first member 31 is attached to the second member 41 so as to be tiltable relative to the drive shaft.

[0020] With the above configuration, even if the other end side surface W2 of the workpiece W is inclined with respect to the reference plane W1 of the workpiece W, the first member 31 can tilt in accordance with the inclination, thereby absorbing the inclination of the other end side surface W2 of the workpiece W, and the workpiece W can be appropriately rotatably supported. Therefore, appropriate shape accuracy can be obtained by grinding.

[0021] (2) In the embodiment, one of the first member 31 and the second member 41 may have a convex curved surface 33 provided on the annular outer edge portion 32, and the other of the first member 31 and the second member 41 may have a tapered surface 43 provided on the annular outer edge portion 42, and the curved surface 33 may be in contact with the tapered surface 43. This allows the first member 31 to be attached to the second member 41 so as to be tiltable with respect to the drive shaft due to the linear contact between the curved surface 33 and the tapered surface 43.

[0022] (3) Furthermore, in the embodiment, a convex spherical surface 44 may be provided at one end of the first member 31 and the second member 41, and a concave curved surface 34 that receives the spherical surface 44 may be provided at the other end of the first member 31 and the second member 41, and the spherical surface 44 may be in contact with the curved surface 34. This allows the first member 31 to be attached to the second member 41 so as to be tiltable with respect to the drive shaft due to the planar contact between the spherical surface 44 and the curved surface 34.

[0023] The above-described embodiments are merely examples described to facilitate understanding of the invention. The technical scope of the invention is not limited to the specific technical matters disclosed in the above-described embodiments, but also includes various modifications, changes, alternative technologies, etc. that can be easily derived therefrom.

[0024] REFERENCE SIGNS LIST 1 Grinding device 11 Reference member 21 Pressing member 31 First member 32 Outer edge portion 33 Convex curved surface 34 Concave curved surface 41 Second member 42 Outer edge portion 43 Tapered surface 44 Spherical surface W Workpiece W1 Reference surface W2 Other end side surface

Claims

1. A grinding device comprising: a reference member attached to a drive shaft and supporting a reference surface formed on one end side of a workpiece; and a pressing member attached to a driven shaft and supporting the other end side of the workpiece so as to be able to clamp the workpiece between the reference member and the pressing member; wherein the pressing member comprises a first member attached to the other end side and a second member that presses the first member against the other end side; and wherein the first member is attached to the second member so as to be tiltable relative to the drive shaft.

2. A grinding device as described in claim 1, comprising: a convex curved surface provided on the annular outer edge of one of the first member and the second member; and a tapered surface provided on the annular outer edge of the other of the first member and the second member, wherein the curved surface and the tapered surface are in contact with each other.

3. The grinding device according to claim 1, comprising: a convex spherical surface provided at one end of the first member and the second member; and a concave curved surface provided at the other end of the first member and the second member, wherein the spherical surface and the curved surface are in contact with each other.

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