JP2005118934A - Workpiece driving device for grinding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece driving device for a grinding device by which grinding work efficiency can be improved by providing not only a working driving means for rotating a rotary support member together with a workpiece when the workpiece is ground, but also an indexing driving means for rotating the rotary support member together with the workpiece when a working position of the workpiece is indexed in the workpiece driving device for various grinding devices. <P>SOLUTION: The workpiece driving device 3 for a grinding device is provided with a main spindle 5 for supporting the workpiece W, the working driving means 15 for rotating the main spindle 5 together with the workpiece W when the workpiece W is ground, a gear mechanism 26 for the indexing driving means, which rotates the main spindle 5 together with the workpiece W when the working position of the workpiece W is indexed, a rotational transmission state switching means, which switches to a readiness for transmission P of transmitting the rotation of the indexing driving means to the main spindle 5 and an un-readiness for transmission of the rotation of the indexing driving means to the main spindle 5, and a rotation preventing state switching means 32 which switches to a rotation preventing state M of preventing the rotation of the main spindle 5 and a rotation allowable state N of allowing the rotation of the main spindle 5. By this, not only grinding finishing is executed to the workpiece W while supporting the workpiece W to the main spindle 5 without detaching the workpiece W from the main spindle 5, but also shape creation grinding can be executed to the workpiece W after indexing the working position of the workpiece W. As a result, the grinding work efficiency can be improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a workpiece driving device installed in a cylindrical grinding apparatus that performs grinding finishing on the outer periphery of a workpiece by, for example, a rotational grinding motion of a grinding wheel and a rotational feed motion of a workpiece.

  In a conventional cylindrical grinding apparatus, the workpiece driving device has a rotation support member that supports the workpiece, and has only a function as a processing drive means for rotating the rotation support member together with the workpiece during grinding of the workpiece. It was. Therefore, for example, when performing the shape creation grinding, when indexing the processing position of the workpiece, it is necessary to install a dedicated indexing device in the cylindrical grinding device instead of the conventional workpiece driving device. there were.

  As described above, it is not only necessary to replace the conventional workpiece driving device and the dedicated indexing device according to the type of processing, but also it is necessary to remove the workpiece from the rotating support member at the time of replacement, Grinding work efficiency was getting worse.

  The present invention provides a workpiece drive device for various grinding machines, in which not only the machining drive means for rotating the rotation support member together with the workpiece during grinding of the workpiece, but also the rotation support member for indexing the machining position of the workpiece. An object of the present invention is to improve grinding work efficiency by providing an indexing drive means that rotates together with the workpiece.

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 3) of the embodiments described later.
A workpiece driving device (3) for a grinding apparatus according to the invention of claim 1 is installed in a grinding device (1) for grinding a workpiece (W) by a rotational grinding motion of a grinding wheel (10). Rotation support members (5, 6) for supporting (W) and processing drive means (15) for rotating the rotation support members (5, 6) together with the workpiece (W) during grinding of the workpiece (W). And an indexing drive means (22) for rotating the rotation support members (5, 6) together with the workpiece (W) when indexing the machining position of the workpiece (W), and the indexing drive means (22 ) Rotation transmission state switching means (29) capable of switching between a transmission possible state (P) for transmitting the rotation of the rotation support member (5, 6) to a transmission impossible state (Q) not transmitting, and the rotation support member (5). 6) Rotation prevention state (M) for preventing rotation and allowable rotation permission And a state rotation preventing state switching device that can switched between (N) (32).

  When grinding the workpiece (W), the rotation prevention state switching means (32) is set to the rotation allowable state (N), and the rotation transmission state switching means (29) is set to the transmission disabled state (Q). The rotation support members (5, 6) are continuously rotated together with the workpiece (W) by the processing drive means (15). When indexing the machining position of the workpiece (W), the rotation prevention state switching means (32) is set to the rotation permissible state (N) and the rotation transmission state switching means (29) can be transmitted (P Then, the rotation support member (5, 6) is rotated together with the workpiece (W) by the indexing drive means (22). Thereafter, the rotation prevention state switching means (32) is set to the rotation prevention state (M), and the shape creation grinding process is performed on the workpiece (W) by the grinding wheel (10).

  According to the first aspect of the present invention, if the workpiece driving device (3) for the grinding device is installed in the grinding device (1), the workpiece (W) is rotated and supported without being removed from the rotating support members (5, 6). Not only can the workpiece (W) be ground while being supported by the members (5, 6), but also shape creation grinding can be performed after indexing the processing position of the workpiece (W). it can. Therefore, grinding work efficiency can be improved.

  In the second aspect of the invention based on the first aspect of the invention, an indexing scale member (12) that rotates together with the rotation support member (5, 6) is provided. In the invention of claim 2, since the indexing position can be confirmed using the indexing scale member (12) when indexing the processing position of the workpiece (W), the grinding work efficiency is further improved. .

  In the invention of claim 3 based on claim 1 or claim 2, the indexing drive means (22) includes a transmission member (gear 27) that rotates together with an input rotation shaft (24) and the rotation support. A transmission mechanism (gear mechanism 26) capable of meshing with a transmission member (gear 28) that rotates together with the members (5, 6), and a rotation applying portion (25) that rotates the input rotation shaft (24); The rotation transmission state switching means (29) is an input rotation shaft (24) for the transmission member (28) on the rotation support member (5, 6) side by the transmission mechanism (26) of the indexing drive means (22). It can be switched between a connection state (meshing state P) in which the transmission member (27) on the side is connected and a connection release state (meshing release state Q) in which the connection is released.

  In the invention of claim 4 based on the invention of claim 3, the rotation transmission state switching means (29) includes a rotating member (23) to which the indexing drive means (22) is attached. The rotation center line (23a) of the moving member (23) is the rotation center line (24a) of the transmission member (27) on the input rotating shaft (24) side in the transmission mechanism (26) of the indexing drive means (22). With the eccentricity, the connection state (P) and the connection release state (Q) can be switched in accordance with the rotation operation with respect to the rotation member (23).

  In the invention of claim 5 premised on the invention of any one of claims 1 to 4, the rotation prevention state switching means (32) is locked to the rotation support member (5, 6). And a locking member (33) for releasing the lock on the rotation support member (5, 6) and setting the rotation permissible state (N).

  In the third to fifth aspects of the invention, the indexing drive means (22), the rotation transmission state switching means (29), and the rotation prevention state switching means (32) can be realized by a simple mechanism.

  The present invention provides not only the machining drive means (15) but also the indexing drive means (22), the rotation transmission state switching means (29) and the rotation in the workpiece drive device (3) of the various grinding apparatuses (1). Since the blocking state switching means (32) is also provided, a dedicated indexing device is not required and the grinding work efficiency can be improved.

Hereinafter, a cylindrical grinding apparatus and a workpiece driving apparatus according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 (a) and 1 (b), a headstock 3 (workpiece driving device) and a tailstock 4 are installed on a table 2 of a cylindrical grinding machine 1 so as to be movable and adjustable. 3 and the tailstock 4 can be attached to and detached from the table 2. The center 6 of the spindle 5 that rotates on the spindle stock 3 and the center 7 of the tailstock 4 are opposed to each other, and a workpiece W is supported between the centers 6 and 7. The workpiece W is rotated via the scraper 9 by the scraper 8 attached to the spindle 5. Note that when the workpiece W is supported on a chuck (not shown) attached to the main shaft 5, the knurl turning 8 and the knurl 9 are not required. A grinding wheel 10 rotated by a grinding wheel base (not shown) is applied to the outer periphery of the workpiece W, and the grinding wheel base or table 2 is fed in the axial direction of the workpiece W to grind the outer periphery of the workpiece W. Finishing is done. Next, the head stock 3 will be described in detail.

  As shown in FIGS. 1 and 2, the main shaft 5 is rotatably supported in the case 11, and the center 6 is inserted into the main shaft 5 on the rotation center line 5 a so that the front end surface side of the main shaft 5 is located. Protruding from. The center 6 rotates together with the main shaft 5. The main shaft 5 and the center 6 constitute a rotation support member. An indexing scale member 12 is attached to the outer periphery of the front end portion of the main shaft 5 and rotates together with the main shaft 5. On the outermost periphery of the indexing scale member 12, a scale ring 14 facing the annular scale portion 13 provided on the outer periphery of the case 11 is provided. Indexing angles are displayed on the annular scale portion 13 and the scale ring 14.

  As shown in FIGS. 1 and 2, in the machining drive means 15 that rotates the spindle 5 and the center 6 together with the workpiece W during grinding of the workpiece W, the rear end portion of the spindle 5 is coupled to the pulley shaft 16. 17, the rotation of the output shaft 18a of the electric motor 18 is transmitted to the pulley shaft 16 by the drive pulley 19, the drive belt 20, and the driven pulley 21, and the main shaft 5 rotates.

  As shown in FIGS. 1 to 3, the indexing drive means 22 that rotates the spindle 5 and the center 6 together with the workpiece W when the machining position of the workpiece W is indexed can be rotated by the support hole 11 a in the case 11. An input rotary shaft 24 that is rotatably supported with respect to the loosely supported rotating member 23, an operation handle 25 that rotates the input rotary shaft 24, and a gear mechanism 26 are provided. The gear mechanism 26 (transmission mechanism) is attached to the lower end portion of the input rotary shaft 24 and rotates together with the input rotary shaft 24, and is provided on the outer periphery of the main shaft 5 together with the main shaft 5. And a rotating worm 28 (a transmission member which is a gear). Other types of gears may be used for the gear mechanism 26. In the rotation transmission state switching means 29 capable of switching the gear mechanism 26 between the meshing state P (connected state) and the meshing released state Q (connection released state), the rotation of the rotating member 23 to which the indexing drive means 22 is attached. The movement center line 23a is eccentric by an eccentric amount e with respect to the rotation center line 24a of the worm gear 27 on the input rotation shaft 24 side. When the grip handle 30 provided on the rotating member 23 is rotated within a range of 90 degrees, the rotating member 23 rotates with respect to the support hole 11a of the case 11 to take a connection position and a connection release position. In this connection position, the transmission state in which the rotation of the input rotation shaft 24 is transmitted to the main shaft 5 is brought into a meshing state P in which the worm gear 27 on the input rotation shaft 24 side meshes with the worm 28 on the main shaft 5 side. Further, at this connection release position, the worm gear 27 is disengaged from the worm 28 by the eccentric amount e and is brought into a non-transmittable state in the mesh release state Q in which the mesh is released. The rotating member 23 is held at the connection position and the connection release position by a stopper 31 screwed into the case 11.

  In the rotation blocking state switching means 32 that can be switched between a rotation blocking state M that blocks the rotation of the main shaft 5 and an allowable rotation permission state N, a lock pin 33 (locking member) is screwed onto the outer periphery of the case 11. Yes. The lock pin 33 can take the rotation prevention state M locked by press contact with the outer periphery of the main shaft 5 and the rotation allowance state N released from press contact with the main shaft 5.

  When the workpiece W is subjected to cylindrical grinding, the rotation prevention state switching means 32 sets the lock pin 33 to the rotation allowable state N, and the rotation transmission state switching means 29 sets the gear mechanism 26 to the mesh release state Q. The driving motor 15 drives the electric motor 18 to rotate the spindle 5 and the center 6 continuously.

  When indexing the machining position of the workpiece W, the rotation prevention state switching means 32 sets the lock pin 33 to the rotation allowable state N, and the rotation transmission state switching means 29 engages the gear mechanism 26 with the meshing state P. Then, the input driving shaft 24 is rotated by the operating handle 25 (rotation imparting section) by the indexing drive means 22 to rotate the main shaft 5 and the center 6. At this time, since the indexing scale member 12 also rotates, the indexing position is confirmed by aligning the scale ring 14 of the indexing scale member 12 with the annular scale part 13 on the case 11 side. Thereafter, the lock pin 33 is set to the rotation-prevented state M by the rotation-preventing state switching means 32, and the shape creation grinding process is performed on the workpiece W by the grinding wheel 10.

(A) is a top view which shows roughly the cylindrical grinding device concerning this embodiment and its workpiece drive device, (b) is a front view similarly. In the said workpiece drive device, it is sectional drawing which shows schematically a rotation support member and the process drive means especially seeing from the plane side. (A) is the fragmentary sectional view in the AA line of FIG. 2 which shows especially the drive means for an index and the transmission possible state of a rotation transmission state switching means in the said workpiece drive device, (b) is the said rotation transmission. It is a fragmentary sectional view which shows the transmission impossible state of a state switching means.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cylindrical grinding device, 3 ... Main shaft stand (workpiece drive device), 5 ... Main shaft (rotation support member), 6 ... Center (rotation support member), 10 ... Grinding wheel, 12 ... Indexing scale member, 15 ... Processing drive means, 22 ... Indexing drive means, 23 ... Rotating member, 23a ... Rotation center line, 24 ... Input rotation axis, 24a ... Rotation center line, 25 ... Operation handle (rotation imparting part), 26 ... Gear mechanism (transmission mechanism), 27 ... worm gear (transmission member), 28 ... worm (transmission member which is a gear), 29 ... rotation transmission state switching means, 32 ... rotation prevention state switching means, 33 ... lock pin (locking) Member), W ... workpiece, P ... meshing state (connection state), Q ... meshing release state (connection release state), M ... rotation prevention state, N ... rotation permission state.

Claims (5)

In a workpiece drive device installed in a grinding machine that performs grinding finish on a workpiece by rotating grinding motion of a grinding wheel, a rotation support member that supports the workpiece, and this rotation support member together with the workpiece when grinding the workpiece Rotating machining drive means, indexing drive means for rotating the rotation support member together with the workpiece when indexing the machining position of the workpiece, and transmission for transmitting the rotation of the indexing drive means to the rotation support member A rotation transmission state switching means capable of switching between a possible state and a non-transmittable transmission state; and a rotation prevention state switching means capable of switching between a rotation prevention state for preventing rotation of the rotation support member and an allowable rotation permission state. A workpiece driving device for a grinding apparatus, characterized in that The workpiece drive device for a grinding apparatus according to claim 1, further comprising an indexing scale member that rotates together with the rotation support member. The indexing drive means includes a transmission mechanism that can connect the transmission member that rotates together with the input rotation shaft and the transmission member that rotates together with the rotation support member, and a rotation applying unit that rotates the input rotation shaft,
The rotation transmission state switching means is divided into a transmission state in which the transmission member on the input rotating shaft side is connected to the transmission member on the rotation support member side in the transmission mechanism of the indexing drive means, and a transmission release state in which the transmission is released. The workpiece driving device for a grinding apparatus according to claim 1, wherein the workpiece driving device can be switched. The rotation transmission state switching means includes a rotation member to which the indexing drive means is attached, and the rotation center line of the rotation member is a transmission member on the input rotation shaft side in the transmission mechanism of the indexing drive means. 4. The workpiece drive for a grinding apparatus according to claim 3, wherein the center of rotation is decentered and can be switched between the transmission state and the transmission release state in accordance with the rotation operation with respect to the rotation member. apparatus. The rotation blocking state switching means includes a locking member that is locked to the rotation support member to be in the rotation blocking state, and that the rotation support member is released from being locked and is allowed to rotate. The workpiece drive device for a grinding apparatus according to any one of claims 1 to 4, characterized in that:

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