JP2011224668A - Lens grinding method equipped with grinding wheel automatic exchanging device, and lens grinding device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens grinding device equipped with a grinding wheel automatic exchanging device capable of precisely and efficiently grinding a less, while loading grinding wheels of various coarseness on a spindle of a wheel head when performing grinding work from coarse processing to finish processing on the lens.SOLUTION: The lens grinding device 1 includes a grinding device body 5 equipped with a workpiece holder 2 to which a workpiece W can be attached and detached and a spindle 4 containing a wheel head 3 capable of exchanging different grinding wheels T of various coarseness which grind the surface of workpiece W, and an automatic grinding wheel exchanging device 7 equipped with a magazine body on the side of the grinding device body 5 which can move and rotate for exchanging and holding various grinding wheels T corresponding to working on the workpiece W. In the automatic grinding wheel exchanging device 7, a slide plate which can reciprocate in a horizontal direction in a specified region through a drive means and a guide member composed of two rails is installed on a base member set horizontally on a support frame.

Description

  The present invention relates to a lens grinding method equipped with an automatic grindstone changing device (ATC device) and the lens grinding device, and more specifically, when a lens (or a workpiece) is processed from roughing to finishing, it corresponds to the processing. Equipped with an automatic grinding wheel changer that can mount grinding wheels of various counts (rough machining, medium machining, finishing machining, etc.) while exchanging them with the spindle of the wheel head, grinding with high accuracy and efficiency, and reducing the number of post-processes. The present invention relates to a lens grinding method and a lens grinding apparatus.

  Conventionally, lens processing includes processes such as curve generator processing (CG processing), fine grinding processing, grinding processing, centering processing, and the like, and machines and jigs to be processed respectively have been required. In the production of jigs and tools, since they cannot be used in common, it takes time and effort, and the number of types of jigs and tools is enormous.

  Further, in order to use the machine, a processing technique is required. However, since skill is required, there is a problem that it takes time to master the machine. In order to reduce processing man-hours, for example, a CG processing machine has been manufactured that provides a 2-axis grinding wheel for curve generator processing (CG processing), performs roughing and intermediate processing, and performs fine grinding processing, but the processing diameter is large. Then, it is difficult to cope with space problems.

  On the other hand, in the complex machining of machine tools such as metal materials, the complex machining of multiple surfaces of a workpiece is completed by automatically changing the necessary tools in one machine, and zero work in progress is achieved, saving space and savings. A multi-task machine with an automatic tool changer (ATC device) that achieves humanization is known (see, for example, Patent Document 1).

  However, an automatic tool changer in a multi-task machine of a machine tool takes out a tool from the tool magazine of the automatic tool changer by a tool change arm (tool change robot) provided in the multi-task machine, and the X-axis direction, Y-axis direction, and It is mounted on the turret of a multi-task machine while moving in the Z-axis direction, etc., or the tool mounted on the turret is removed and automatically stored in the storage location of the tool magazine. It is difficult to divert an automatic tool changer in a processing machine as it is to a lens grinding machine.

  That is, in the case of a lens grinding apparatus, it is preferable to use a minimum movement axis in order to maintain precision and precision processing such as curved surface processing, and it is difficult to use an automatic tool changer in a compound processing machine as it is.

JP-A-5-23933

  The present invention pays attention to such a conventional problem, and an automatic grindstone changing device is installed adjacent to the lens grinding device, and a spindle provided with a wheel head moves linearly from the engagement recess of the magazine of the automatic grindstone changing device. By taking out the grindstone directly or returning the used grindstone to the engagement recess of the magazine, it is possible to perform highly accurate lens grinding work with a minimum spindle movement distance and linear movement, and to grind efficiently. An object of the present invention is to provide a lens grinding method and a lens grinding apparatus including an automatic grindstone exchanging device that can reduce the post-process.

  In order to achieve the above object, the present invention provides a lens grinding method equipped with a grindstone automatic exchanging device according to the present invention, in which a surface of a workpiece mounted on a workpiece holder of a grinding device main body is applied to a wheel head corresponding to a workpiece machining process. A lens grinding method equipped with an automatic grinding wheel exchanging device that performs processing while exchanging a grindstone mounted on a spindle of the machine, and performs several steps from roughing to finishing on the surface of the work mounted on the work holder. In this case, after each machining step is completed, the spindle is moved back and forth in the horizontal direction between the workpiece machining position and the grindstone exchange position of the magazine of the automatic grindstone exchange device installed at a position adjacent to the grinding machine body. The gist of the invention is to perform grinding work continuously by automatically attaching and detaching different grindstones corresponding to each processing step of the workpiece.

  Here, the automatic replacement work with the grindstones with different counts is performed by processing the surface of the workpiece with the grindstone for rough machining mounted on the spindle of the wheel head, and then the spindle moves to the standby position (Xz), and the adjacent position. Move the magazine of the automatic grinding wheel changer installed in the machine horizontally to the grinding stone exchange position (Xa), move the spindle to the grinding stone exchange position (Xa), and engage the grinding stone for rough machining with the engaging recess of the magazine. Rotate the magazine to the specified angle, move the next grinding wheel for intermediate machining to the grinding wheel exchange position (Xa), raise the magazine, and mount the grinding stone for medium machining on the spindle. Then, move the spindle to the standby position yet, and then move the spindle to the surface position of the work mounted on the work holder to process the surface of the work, and spin it again. The machine moves to the standby position (Xz), horizontally moves the magazine of the automatic grindstone changer installed at the adjacent position to the grindstone exchange position (Xa), moves the spindle to the grindstone exchange position (Xa), and performs intermediate machining The grindstone for engagement is engaged with the engaging recess of the magazine and the magazine is lowered and removed, and then the grindstone for finishing processing to be used next is moved to the grindstone exchange position (Xa) by turning the magazine at a predetermined angle, The magazine is raised, the grinding wheel T for finishing is mounted on the spindle, the spindle moves to the standby position (Xz), and then moves to the surface position of the workpiece mounted on the work holder to finish the workpiece surface. This is a lens grinding method.

Further, a lens grinding apparatus provided with the grindstone automatic exchanging apparatus of the present invention includes a work holder to which a workpiece can be attached and detached, and a spindle having a wheel head capable of exchanging grindstones having different counts for grinding the surface of the workpiece. An automatic grindstone exchanging device comprising a grinder main body and an automatic grindstone exchanging device provided with a movable and swivelable magazine for exchanging and holding various grindstones corresponding to the processing of the workpiece on the side of the grinder main body. A lens grinding apparatus comprising:
The automatic grindstone exchanging device is provided with a slide plate capable of reciprocating in a specified region in a horizontal direction via a guide member and a driving means on a base member installed horizontally on a support frame, on the slide plate, A turning center shaft that can be swung and raised and lowered via the turning drive device and the lifting drive device is erected, and a plurality of grindstones are engaged and held on the upper portion of the turning center shaft at predetermined intervals in the circumferential direction. A central portion of a plate-shaped magazine provided with an engagement recess is horizontally mounted, and the engagement recess of the magazine is swung by the swivel driving device to control the positioning to the grindstone replacement position, and the spindle of the grinding device main body is rotated. The gist of the invention is that the grindstone exchange position and the machining position of the magazine can be reciprocated in the horizontal direction.

  Here, the slide plate is configured to be able to reciprocate in the horizontal direction along the guide member on the base member, and between the forward limit adjusting means and the backward limit adjusting means provided on the base member by the driving means. It is configured to be able to reciprocate.

Since the present invention is configured as described above, the following excellent effects can be obtained. (A). The automatic grinding wheel changer is installed at a position adjacent to the lens grinding machine main body, and the spindle equipped with the wheel head moves linearly to take out the required grinding stone directly from the engaging recess of the magazine of the automatic grinding wheel changer or after use. Returning the grindstone to the engaging recess of the magazine minimizes the spindle movement distance and the spindle moves back and forth in a straight line. I can do it.
(B). The grinding wheel exchange according to the processing process of various lens grinding work is automatically exchanged using the grinding wheel automatic exchange device, so the work in progress can be reduced to zero and labor saving, and the efficiency of the lens grinding work can be improved. Can be raised.
(C). Since it is not necessary to provide a storage place for various types of grindstones or a place to install them, space can be saved.

It is a top view of the whole lens grinding apparatus for enforcing the lens grinding method provided with the grindstone automatic exchange apparatus (ATC apparatus) of this invention. It is a front view of the lens grinding apparatus of FIG. FIG. 3 is a left side view of FIG. 2. It is an enlarged front view of a grindstone automatic exchange device. FIG. 5 is a plan view of FIG. 4. It is an enlarged front view of the spindle of a lens grinding device. It is an expansion vertical front view of the magazine of a grindstone automatic exchange device. It is process explanatory drawing in the origin position of the spindle and magazine in the lens grinding method of this invention. It is explanatory drawing of the process which the grindstone automatic exchange apparatus advanced in the lens grinding apparatus main body side in the lens grinding method of this invention. It is process explanatory drawing which shows the state which the spindle and wheel head of the lens grinding apparatus in the lens grinding method of this invention moved to the grindstone automatic exchange apparatus side, and the magazine chucked the shank. It is process explanatory drawing which shows the state which the spindle of the lens grinding apparatus in the lens grinding method of this invention unclamped the shank, and the magazine fell simultaneously. It is process explanatory drawing which shows the state which the magazine in the lens grinding method of this invention rotated and moved to the position of another grindstone. It is process explanatory drawing which shows the state which the magazine in the lens grinding method of this invention raises, and the spindle clamped the grindstone. It is process explanatory drawing which shows the state which the spindle in the lens grinding method of this invention moved to the lens grinding device side, and the shank of the spindle removed from the magazine. It is process explanatory drawing which shows the state which the grindstone automatic exchange apparatus in the lens grinding method of this invention retracted | retreated from the lens grinding apparatus side.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a plan view of an entire lens grinding apparatus for carrying out a lens grinding method equipped with an automatic grindstone changing apparatus (ATC apparatus) according to the present invention. FIG. 2 is a front view of the lens grinding apparatus of FIG. 2 shows a left side view of FIG. 2, and the lens grinding apparatus 1 is provided with a detachable work holder 2 for a work W (referred to as a lens in this embodiment) and various grindstones for grinding the surface of the work W. A grinder main body 5 having a spindle 4 having a wheel head 3 with a replaceable T, and a movement for exchanging and holding various grindstones T corresponding to the processing of the workpiece W on the side of the grinder main body 5; And an automatic grindstone exchanging device 7 provided with a magazine body 6 that can turn.

  Reference numeral 8 denotes a control panel for controlling the grinding operation of the automatic grindstone changing device 7.

  As shown in FIGS. 4 and 5, the automatic grindstone exchanging device 7 includes a guide member 11 (straight guide) composed of two rails on a base member 10 installed horizontally on a support frame 9 and a driving means 12 ( For example, a slide plate 13 that can reciprocate in a horizontal direction through a specified region (for example, a moving region La between the grindstone replacement position Xa and the grindstone setting position Xb) via a cylinder that moves the main body back and forth is installed. .

  As shown in FIGS. 4 and 5, on the slide plate 13, a turning center shaft 16 capable of turning and raising / lowering is erected via a turning drive device 14 such as a drive motor and a lifting drive device 15 such as a lifting cylinder. Various grindstones T (for example, the number of grindstones T (for example, four places at 90 ° intervals in this embodiment, but not limited to a number) in the circumferential direction are provided on the upper part of the turning center shaft 16. The central portion of a plate-like disc-shaped magazine 18 having a plurality of semi-circular arc-shaped engaging recesses 17 for engaging and holding a roughing grindstone, a medium-grinding grindstone, a finishing grindstone, etc. Is installed horizontally.

  The engaging recess 17 of the magazine 18 is swung by the swivel drive device 14 to control the positioning to the grindstone exchange position Xa, and the spindle 4 of the grinder main body 5 has the grindstone exchange position Xa of the magazine 18 and the machining position. Xz is configured so as to be reciprocally movable in the horizontal direction, and automatic exchange of the grindstone T and processing of the workpiece W are performed.

  As shown in FIG. 4, the slide plate 13 is configured to be reciprocally movable in the horizontal direction along a guide member 11 (straight guide) on the base member 10 via a driving means 12 such as a cylinder. Positioning and adjustment of the movement distance are performed between the forward limit adjusting means 19a (advance end adjusting absorber, etc.) and the reverse limit adjusting means 19b (retreat end adjusting absorber, etc.) provided above.

  Further, as shown in FIG. 6, the spindle 4 of the grinding apparatus body 5 is attached to a side surface of a support plate 20 that is erected vertically, and the support plate 20 to which the spindle 4 is attached is connected to the grinding apparatus body. The base member 21 can be reciprocated in the horizontal direction by a horizontal guide member 22 (straight guide) and a ball screw 24 that can be rotated by a servomotor 23 toward the automatic grindstone changing device 7.

  That is, the nut member 26 attached to the flange member 25 at the lower part of the support plate 20 is screwed into the ball screw 24 that can be rotationally driven by the servo motor 23, and the ball screw 24 is driven forward or reverse by the servo motor 23. The support plate 20 connected to the ball screw 24 via the nut member 26 reciprocates in the horizontal direction along the guide member 22 (linear guide), and at the same time, the spindle 4 having the wheel head 3 capable of exchanging the grindstone T is also left and right. It moves in the horizontal direction between the direction, that is, the grindstone exchange position Xa of the magazine 18 and the machining position Xz.

  Further, as shown in FIGS. 4 and 7, the rotational drive mechanism of the turning center shaft 16 to which the disk-shaped magazine 18 of the automatic grindstone changing device 7 is attached is a rotational drive shaft 27 of the turning drive device 14 such as a drive motor. Is provided with a pair of sprockets or pulleys 29a and 29b and a connection band 30 such as a chain or transmission belt. The rotational driving force of the turning drive device 14 is transmitted to the turning center shaft 16.

  Further, an elevating drive device 15 such as the elevating cylinder described above is installed in the middle of the turning center shaft 16 so as to move up and down a disk-shaped magazine 18 attached to the upper portion of the turning center shaft 16.

  In addition, the engaging recesses 17 formed at predetermined intervals in the circumferential direction of the magazine 18 insert the concave and convex portions 33 formed in the shank 32 formed by fastening the grindstone T with a fastening member 31 such as a bolt from the horizontal direction. At the grindstone exchange position Xa of the magazine 18, the spindle 4 of the wheel head 3 enters the engaging recess 17 of the magazine 18 from the horizontal direction and is provided on the spindle 4 (not shown). Is configured to clamp the shank 32 that holds the grindstone T.

  The arbitrary positions of the engaging recesses 17 formed at a predetermined interval in the circumferential direction of the magazine 18 are swung to the grindstone replacement position Xa by the swivel driving device 14 such as the drive motor. The operator performs the work of detaching the various grindstones T from the concavity 17 at the set position Xb of the grindstone T.

  Next, the lens grinding method provided with the grindstone automatic changing device 7 will be described.

  In the lens grinding method of the present invention, the surface of the workpiece W mounted on the workpiece holder 2 of the grinding machine body 5 is mounted (clamped) on the spindle 4 of the wheel head 3 in accordance with the machining process of the workpiece W. It is a lens grinding method provided with the grindstone automatic exchanging device 7 which performs processing while exchanging the lens.

  When several steps from roughing to finishing are performed on the surface of the workpiece W mounted on the workpiece holder 2, the spindle 4 is moved to the machining position Xz of the workpiece W and the grinding device body 5 after each machining step is completed. The grindstone T with different numbers corresponding to each processing step of the workpiece W is removed by reciprocating horizontally between the grindstone exchange position Xa of the magazine 18 of the automatic grindstone exchanging device 7 installed at a position adjacent to In this method, the grinding work is continuously performed by automatically performing the replacement.

  That is, in the automatic exchange work with the grindstone T having different counts, the surface of the workpiece W is machined by the roughing grindstone T mounted on the spindle 4 of the wheel head 3, and then the spindle 4 moves to the standby position Xz. The magazine 18 of the automatic grindstone exchanging device 7 installed at the adjacent position is moved horizontally to the grindstone exchanging position Xa, the spindle 4 is moved to the grindstone exchanging position Xa, and the grindstone T for roughing is placed in the engaging recess 17 of the magazine 18. Engage and the magazine 18 is lowered and removed.

  Then, the magazine 18 is turned by a predetermined angle to move the next processing grindstone T to be used to the grindstone changing position Xa, the magazine 18 is lifted, and the medium processing grindstone T is mounted on the spindle 4 to the spindle. 4 is moved to the standby position. After that, the spindle 4 is moved to the surface position of the work W mounted on the work holder 2 to process the surface of the work W, and the spindle 4 is moved again to the standby position Xz, and the automatic grindstone installed at the adjacent position is changed. The magazine 18 of the apparatus 7 is moved horizontally to the grindstone exchange position Xa, the spindle 4 is moved to the grindstone exchange position Xa, the medium processing grindstone T is engaged with the engagement recess 17 of the magazine 18 and the magazine 18 is lowered. Remove it.

  Then, the magazine 18 is turned by a predetermined angle to move the grinding T stone for finishing processing to be used next to the grinding wheel changing position Xa, the magazine 18 is raised, and the grinding stone T for finishing processing is mounted on the spindle 4. The spindle 4 is moved to the standby position Xz, and then moved to the surface position of the work W mounted on the work holder 2 to finish the surface of the work W.

  The lens grinding method provided with the grindstone automatic exchanging device 7 of the present invention will be described more specifically with reference to FIGS.

  In the following description, the presence / absence of the grindstone T of the spindle 4 of the wheel head 3 and the presence / absence of the grindstone T in the case of two positions (magazine 18A, magazine 18B) will be described.

  FIG. 8 shows a case where the spindle 4 and the magazine 18 of the grinding apparatus body 5 are at the origin position, the spindle 4 of the wheel head 3 and the magazine 18A have no grindstone T, and the magazine 18B has the grindstone T. Yes.

  From this state, as shown in FIG. 9, the slide plate 13 of the automatic grindstone exchanging device 7 moves horizontally along the guide member 11 (straight guide) on the base member 10 via the driving means 12 such as a cylinder, that is, The magazine 18A without the grindstone T is moved to the grinder main body 5 side (forward movement), and the magazine 18A is located at the grindstone replacement position Xa. At this time, the spindle 4 of the wheel head 3 and the magazine 18B have the grindstone T, and the magazine 18A has no grindstone T as described above.

  Next, as shown in FIG. 10, the wheel head 3 provided on the support plate 20 to which the spindle 4 is attached is driven by a servo motor 23 to drive the guide member 22 (straight line) provided on the base member 21 of the polishing apparatus body 5. Guide) and the ball screw 24 are moved in the horizontal direction, that is, to the grindstone exchanging position Xa of the automatic grindstone exchanging device 7, and the grindstone T for rough machining mounted on the spindle 4 is engaged with the engaging recess 17 of the magazine 18A. The magazine 18A chucks the uneven portion 33 formed in the shank 32.

  In the state of FIG. 10, the wheel 4 has a grinding wheel T on the spindle 4 and the magazines 18 </ b> A and 18 </ b> B. Then, as shown in FIG. 11, the spindle 4 of the wheel head 3 unclamps the shank 32 of the grindstone T (releases the clamped state), and at the same time, the turning center shaft 16 that supports the entire magazine 18 is driven up and down such as a lifting cylinder. The entire magazine 18 that holds and holds the grindstone T in the magazines 18A and 18B is lowered through the device 15.

  Then, with the magazine 18 as a whole lowered as shown in FIG. 12, the magazine 18 is rotated 180 degrees about the rotation center axis 16 via a rotation drive device 14 such as a drive motor, and another type of grindstone T Is moved to the grinding wheel replacement position Xa. At this time, the spindle 4 of the wheel head 3 does not have the grindstone T, and the magazines 18A and 18B have the grindstone T.

  From this state, as shown in FIG. 13, the magazine 18 supported by the turning center shaft 16 is lifted to a predetermined position via a lifting drive unit 15 such as a lifting cylinder, and the grindstone T held by the magazine 18B is moved to the wheel head. 3 spindles 4 are clamped via a clamping mechanism.

  When the spindle 4 of the wheel head 3 completes the clamping process of the other grindstone T, the spindle 4 is guided on the base member 21 of the grinding apparatus body 5 by the rotational drive of the servo motor 23 as shown in FIG. The member 22 (straight guide) and the ball screw 24 move horizontally to the processing position Xz of the polishing apparatus body 5, and the shank 32 of the grindstone T held in the magazine 18B is automatically removed.

  At this time, the spindle 4 of the wheel head 3 and the magazine 18A have a grindstone T, and the magazine 18B has no grindstone T.

  Thereafter, as shown in FIG. 15, the automatic grindstone exchanging device 7 returns to the origin position while retreating in the horizontal direction from the polishing device main body 5 side, and waits for the next grindstone exchanging operation.

  At this time, the spindle 4 of the wheel head 3 and the magazine 18A have a grindstone T, and the magazine 18B has no grindstone T. For example, the grindstone of the magazine 18A is replaced with a grindstone for the next work. Is what you do.

  As described above, in the lens grinding process, by repeatedly performing the operations of FIGS. 8 to 15, the moving distance of the spindle 4 can be minimized, and the spindle 4 reciprocates linearly. The lens grinding operation can be performed with high accuracy with little holding or shaking.

  In addition, since the wheel replacement according to the various lens grinding operations is automatically performed using the automatic wheel replacement device, the work in progress can be reduced to zero and labor saving. Efficiency can be increased.

  According to the present invention, a glass raw material or a resin raw material can be ground to perform lens grinding with high accuracy.

DESCRIPTION OF SYMBOLS 1 Lens grinding device 2 Work holder 3 Wheel head 4 Spindle 5 Grinding device main body 6 Magazine main body 7 Automatic grindstone changing device 8 Control panel 9 Support frame 10 Base member 11 Guide member (linear guide)
12 Driving means W Work T Grinding wheel Xa Grinding wheel replacement position Xb Grinding wheel setting position Xz Standby position La Moving region 13 Slide plate 14 Turning drive device 15 Lifting drive device 16 Turning center shaft 17 Engaging recess 18A, 18B Magazine 19a Advance limit adjusting means (Forward end adjustment absorber, etc.)
19b Backward limit adjusting means (backward end adjusting absorber, etc.)
20 support plate 21 base member 22 guide member (straight guide)
23 Servo motor 24 Ball screw 25 Flange member 26 Nut member 27 Rotation drive shaft 28 Power transmission mechanism 29a, 29b Pulley 30 Connection band 31 Fastening member 32 Shank 33 Uneven portion

Claims (4)

A lens grinding method equipped with a grinding wheel automatic changer that processes the surface of the workpiece mounted on the workpiece holder of the grinding machine body while replacing the wheel mounted on the spindle of the wheel head corresponding to the workpiece machining process. There,
When performing several steps from roughing to finishing on the surface of the workpiece mounted on the workpiece holder, the spindle is placed at a position adjacent to the workpiece machining position and the grinding machine body after each machining step is completed. The grinding wheel is continuously moved by reciprocating in the horizontal direction between the magazine and the grinding wheel exchange position of the automatic grinding wheel changer, and the grinding stones with different numbers corresponding to each machining process are automatically attached and removed. A lens grinding method equipped with an automatic grindstone exchange device.   In the automatic exchange work with the grindstones with different counts, the surface of the workpiece was processed with a roughing grindstone mounted on the spindle of the wheel head, and then the spindle moved to the standby position (Xz) and installed at an adjacent position. Move the magazine of the automatic grindstone changer horizontally to the grindstone exchange position (Xa), move the spindle to the grindstone exchange position (Xa), engage the grindstone for roughing with the engaging recess of the magazine, and lower the magazine Then, rotate the magazine at a predetermined angle, move the grinding stone for next machining to be used to the grinding stone exchange position (Xa), raise the magazine, attach the grinding stone for middle machining to the spindle, Is moved to the standby position, and then the spindle is moved to the surface position of the workpiece mounted on the work holder, the surface of the workpiece is machined, and the spindle waits again. Move to the position (Xz), move the magazine of the automatic whetstone changer installed in the adjacent position horizontally to the whetstone changing position (Xa), move the spindle to the whetstone changing position (Xa), and grindstone for medium machining Is engaged with the engaging recess of the magazine, and the magazine is lowered and removed, and then the magazine is rotated by a predetermined angle to move the grinding wheel for the next finishing work to the grinding wheel replacement position (Xa), and the magazine is raised. And a finishing grindstone T is mounted on the spindle, the spindle moves to the standby position (Xz), and then moves to the surface position of the workpiece mounted on the workpiece holder to finish the workpiece surface. A lens grinding method comprising the grindstone automatic exchange device according to 1. Grinding machine main body comprising a work holder in which a work can be attached and detached, and a spindle having a wheel head capable of exchanging various grindstones for grinding the surface of the work, and processing of the work on the side of the grinding machine main body A lens grinding device provided with a grindstone automatic exchanging device comprising an automatic grindstone exchanging device having a movable and swivel magazine for exchanging and holding various grindstones corresponding to
The automatic grindstone exchanging device is provided with a slide plate capable of reciprocating in a specified region in a horizontal direction via a guide member and a driving means on a base member installed horizontally on a support frame, on the slide plate, A turning center shaft that can be swung and raised and lowered via the turning drive device and the lifting drive device is erected, and a plurality of grindstones are engaged and held on the upper portion of the turning center shaft at predetermined intervals in the circumferential direction. A central portion of a plate-shaped magazine provided with an engagement recess is horizontally mounted, and the engagement recess of the magazine is swung by the swivel driving device to control the positioning to the grindstone replacement position, and the spindle of the grinding device main body is rotated. A lens grinding apparatus provided with an automatic grindstone exchanging device, wherein the grindstone exchanging position and the machining position of the magazine can be reciprocated in the horizontal direction.   The slide plate is configured to be reciprocally movable in the horizontal direction along the guide member on the base member, and can be reciprocated by the driving means between the forward limit adjusting means and the reverse limit adjusting means provided on the base member. A lens grinding apparatus comprising the grindstone automatic changing apparatus according to claim 3 configured as described above.

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