JP2006026765A - Device for machining perimeter of disk-shaped workpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for machining a perimeter of a disk-shaped workpiece having a relatively small size, such as a lens, and a disk base plate for a recording medium, wherein the device can carry out long-time continuous operation and achieves high productivity without increasing the installation space therefor. <P>SOLUTION: During the operation of the device for machining a perimeter of a disk-shaped workpiece, a cassette of machined workpieces and a cassette of unmachined workpieces, which are placed on a work stand are exchangeable for each other without stopping the machine. The device is formed of a machining stage 1, the work stand 1, and a loader hand 4 for carrying the workpieces 9 to the machining stage 2. A plurality of pairs of guide rails 24 are arranged horizontally on the work stand in parallel with each other, and the cassette housing the workpieces therein is guided by the guide rails so as to be attached onto/detached from the work stand sideways like a pullout drawer. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus for processing the peripheral edge of a relatively small disk-shaped workpiece, such as a lens centering machine or an inner / outer peripheral edge processing apparatus for a disk substrate for a recording medium. The present invention relates to the above-described apparatus characterized by the mounting structure of the processed workpiece.

  Since the peripheral processing device for a lens or a disk substrate is a machine that processes only the peripheral edge of a relatively small workpiece, the processing time for one workpiece is short. For this reason, this type of apparatus is equipped with a work table on which a large number of workpieces can be placed adjacent to the machining stage (where the machining is performed), and a loader that loads and unloads workpieces onto the machining stage It has. Moreover, since it is complicated to handle the workpieces one by one, they are accommodated in a cassette and transported or attached to / detached from a mechanical device.

  FIG. 4 is a schematic perspective view showing a main part of a lens centering machine including a work table and a loader. In the figure, 2 is a machining stage, 1 is a work table, 31 is a cassette loaded on the work table, 32 is a receiving frame provided in the cassette for orderly supporting a large number of workpieces, and 16 is fixed to the work table. A traverse guide having a portal structure, 17 is a traverse arm extending in a direction orthogonal to the traverse guide 16, 33 is a loader hand that travels along the traverse arm 17, and 19 is a positioning that moves the loader hand 33 along the traverse arm 17. An X-direction servomotor 18 is a Y-direction servomotor that moves and positions the traverse arm 17 along the traverse guide 16.

  The workpiece to be processed is loaded onto the workpiece table 1 by positioning and fixing the cassette on the workpiece table 1 while being accommodated in the cassette 31. In general, a plurality of cassettes 31 can be positioned and fixed on the work table 1. The loader hand 33 moves on the XY plane on the work table 1 by rotation control of the servo motors 18 and 19, takes out the work one by one from the cassette 31, and conveys it to the processing stage 2. The processing stage 2 includes a spindle 5 having a holder at the upper end and a grindstone 6, and the work 35 fed to the processing stage is held by the holder 34 and rotates around the spindle 5, and the outer periphery is processed by the grindstone 6. Is done. The processed workpiece is again held by the loader hand 33 and returned to the original position of the cassette. The work table 1 is provided with a work centering table and a machined work cleaning device as necessary.

When all of the workpieces in multiple cassettes loaded on the work table are processed, the machine is stopped, the processed work cassette on the work table is removed, the unprocessed work cassette is loaded, and the machine is restarted. To do.
Japanese Patent Laid-Open No. 2003-256014

  A workpiece processing apparatus is required to be continuously operated for as long a time as possible in order to reduce processing costs and improve productivity. For this reason, in the conventional apparatus, a large number of workpieces are mounted on the workpiece table 1 for continuous machining, but as described above, this kind of workpiece peripheral edge machining apparatus is capable of machining one workpiece. Since the time is short, when trying to perform continuous machining for a long time, there is a problem that the work table has to be widened in order to increase the number of workpieces mounted, and the installation area of the apparatus becomes large.

  In order to increase the machining efficiency of the workpiece, it is conceivable to provide two machining stages 2 and perform parallel machining of the workpiece on one workpiece table with two machining stages. Although the machining time is shortened, the ratio of the time for stopping the machine for loading and unloading the workpiece increases, and the machining speed is improved, but the problem is that the machine operating rate is lowered.

  The present invention has been made to solve the above-described problems. In a peripheral processing apparatus for a disk-shaped workpiece with a short processing time per workpiece, the processing apparatus can be operated continuously for a longer time, It is an object of the present invention to obtain the above-described apparatus that can realize higher productivity without increasing the working rate of the apparatus even if the processing time is improved and without increasing the installation space of the machine.

  The present invention solves the above-mentioned problem by making it possible to exchange the processed workpiece cassette and the unprocessed workpiece cassette on the workpiece table without stopping the machine.

  The peripheral processing apparatus for a disk-shaped workpiece according to the invention of claim 1 of the present application is a disk-shaped workpiece housed in a machining stage 2, a work table 1 adjacent to the machining stage, and a cassette 23 mounted on and removed from the work table. In a peripheral processing apparatus for a disk-shaped workpiece, comprising a loader hand 4 for picking up the workpiece 9 from the cassette and transporting it to the machining stage 2, a plurality of parallel guide rails arranged in parallel with each other on the workpiece table 24, and the cassette is guided by the guide rail and is detachably mounted on the work table from the side.

  The invention according to claim 2 of the present application is the peripheral processing apparatus provided with the above means, wherein the work table 1 includes a lock device 27 for fixing a cassette inserted into each guide rail for each pair of the guide rails, The control device 20 that controls the loader hand 4 makes it possible to release the lock device 27 that fixes the one cassette when the workpiece take-out and return position moves from one cassette to the next cassette. It is characterized by this.

  The invention of claim 3 of the present application is characterized in that, in the peripheral edge processing apparatus provided with the above means, the work 9 is stored in the cassette 23 with its disk surface in the vertical direction.

  Since the processing time for one workpiece is short, the peripheral processing device for a disk-shaped workpiece needs to load and unload the workpiece in a short time in order to follow this. Will move on. Therefore, it is necessary for the loader hand 4 to transport the workpiece along the shortest path as close as possible to the upper surface of the cassette 23. Therefore, the loader hand 4 is provided close to the cassette 23 on the workpiece table.

  Therefore, in the conventional apparatus, the cassette on the work table can be replaced if the machine is not stopped even if the loader is transporting the work of the cassette located away from the cassette. There wasn't.

  On the other hand, in the apparatus of the present invention, the cassette 23 can be pulled out and removed from the work table 1 in the horizontal direction, and a cassette of an unprocessed work can be inserted into the work table 1 in the horizontal direction to exchange the cassette. Therefore, even if the loader hand 4 is traveling close to the cassette to be replaced, there is no trouble in replacing the cassette 23, and therefore it is not necessary to stop the machine when replacing the cassette.

  Even in an apparatus that can process a workpiece on the workpiece table 1 in a short time by providing a plurality of machining stages 2 on one workpiece table 1 and performing parallel machining, cassette exchange between the processed workpiece and the unmachined workpiece is possible. Therefore, there is no need to stop the machine, so there is no problem of a reduction in the operation rate of the machine, and the improvement of the machining speed by providing a plurality of machining stages directly leads to the improvement of productivity per machine. There is an effect.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings, taking as an example an inner / outer periphery processing apparatus for a recording medium disk substrate (hereinafter simply referred to as “disk”) having two processing stages. FIG. 1 is a schematic perspective view showing a main part of the apparatus of the embodiment, FIG. 2 is a perspective view showing details of the loader hand, and FIG. 3 is a view showing a base plate of a work table and a cassette mounted thereon. It is the figure shown from the arrow A direction of 1.

  The disk peripheral processing apparatus shown in the figure includes a planar rectangular work table 1 and two processing stages 2a and 2b arranged outside one side thereof. Each processing stage 2 includes a spindle 5, an outer peripheral grindstone 6, and an inner peripheral grindstone 7, and the spindle 5 and the grindstones 6 and 7 are rotated to hold a disk held by a holder 8 at the upper end of the spindle. The inner periphery and outer periphery of (work) are processed simultaneously.

  Above the work table 1, a traverse guide 16, a traverse arm 17, an X-direction servomotor 19 and a Y-direction servomotor 18 having the same structure as described in FIG. 4 are provided. A loader hand 4 that is moved and positioned in the direction indicated by an arrow X in the figure by a direction servo motor 19 is mounted.

  An unprocessed disk centering table 21 and a processed disk drying table 22 are disposed in the center of the work table 1 in the width direction (Y direction). Three pairs of Y-direction rails 24 (see FIG. 3) for guiding the cassette 23 are provided on both sides in the Y-direction sandwiching the centering table 21 and the drying table 22 on the upper surface of the work table 1. The distance between the paired rails is substantially equal to the width of the cassette 23, and each cassette 23 is provided with a flange 25 guided by the rail.

  Each cassette 23 is positioned in the X direction of FIG. 1 by fitting the rail 24 and the flange 25, and the lower end portion of the front panel 26 is provided on the side of the work table 1 so as to correspond to each rail pair. Positioned in the Y direction at a position locked against the device 27. A handle 28 and a lock release button 29 for pulling out the cassette from the work table 1 are attached to the front panel 26 of each cassette.

  The cassette 23 is open at the top and includes a plurality of rows of disk receiving frames 32 therein. Each disk receiving frame 32 is a frame having a U-shaped cross section, and the disk is accommodated in each cassette 23 in a state in which the disk is arranged in the U-shaped groove of the receiving frame 32 in a direction perpendicular to the surface with the surface vertical.

  A loader hand 4 for conveying a disk between a work table and a processing stage is shown in FIG. The loader hand 4 is provided with a finger 3 extending toward the processing stage in order to avoid interference with members such as the work holder 8 on the processing stage. Are sequentially transferred to the processing stage 2 and the processed disk is carried out to the cassette 23.

  The loader hand 4 shown in the figure has two fingers, a main finger 3a and an auxiliary finger 3b, and each finger has a suction pad 15 for vacuum-sucking the disk 9 at its tip. The main finger 3a is rotatable about a horizontal axis 10 and is connected to the rod 11a of the swing cylinder 11. The main finger 3a is moved 90 degrees from the horizontal direction shown in the figure by the advance and retreat of the rod 11a of the swing cylinder 11. The direction can be changed to a downward direction rotated downward.

  The main finger 3a and the auxiliary finger 3b are provided on the hand base 12 that travels along the traverse arm 17 so as to be movable up and down. The lift guide 13 of the main finger 3a has a large stroke, while the lift guide 14 of the auxiliary finger 3b has a small stroke.

  The raw disk accommodated in the cassette 23 on the work table 1 with the surface vertical is sucked by the suction pad 15 of the main finger 3a moved downward and moved upward, and then the main finger 3a is raised. , Pulled out from the cassette 23. Next, the disk 9 is placed on the centering table 21 by moving the hand base 12 with the main finger 3a in the horizontal direction. The disk 9 is centered on the centering table 21 and again adsorbed by the suction pad 15 of the main finger 3a.

  Next, the hand base 12 moves to one of the processing stages 2a and 2b, sucks and holds the processed disk by the auxiliary finger 3b, and moves the unprocessed disk that is moved sideways and sucked by the main finger 3a. It is supplied to the holder 8 at the upper end of the spindle 5 of the processing stage. The processed disk 9 adsorbed by the auxiliary finger 3b is conveyed to the drying table 22, and after removing and evaporating the grinding fluid (water) with dry air, it is adsorbed by the main finger 3a and returned to the original cassette. It is conveyed and accommodated in the cassette by the downward movement and the downward movement of the main finger 3a.

  The control device 20 that controls the machine sequentially transfers unprocessed workpieces in a plurality of (six in the illustrated apparatus) cassettes 23 loaded on the workpiece table 1 to the processing stages 2a and 2b, and returns the processed workpieces to the original. The disk is continuously processed by returning to the cassette. The control device 20 counts the number of processed pieces, and can know how far the cassette disk that is currently being processed has been processed. When all the disks of one cassette have been processed, the control device 20 moves the loader hand 4 to the next cassette and processes a new cassette work.

  The order in which the loader hand 4 circulates a plurality of cassettes on the work table 1 is constant, and the operator can know which cassette is being processed by looking at the movement of the loader hand. It is possible to discriminate a cassette whose workpiece has been processed. Therefore, the operator releases the lock by pressing the cassette lock release button 29, pulls out the processed workpiece cassette to the side of the workpiece table 1, and replaces it with a cassette containing unprocessed workpieces.

  The cassette can be unlocked by an AND condition between the processing completion signal for the cassette from the control device 20 and the operation signal of the lock release button 29. In this case, when the processing of the workpiece of a certain cassette is completed (that is, when the workpiece hand is moved to the next cassette), the lock device 27 that fixes the cassette before the movement can be unlocked. . An operator pushes the lock release button 29 of the cassette that can be unlocked to release the lock, pulls it out to the side of the work table, and replaces it with a cassette containing unprocessed work. If a display lamp indicating that the lock can be released is provided on the front panel 26 of the cassette, the operator can more easily discriminate the processed cassette.

  When a new cassette is loaded on the work table, the lock device 27 automatically locks the cassette, and this lock signal is transmitted to the control device 20.

  Therefore, the control device 20 can know which cassette has been processed according to the state of the lock device 27 corresponding to each cassette. If necessary, when the processed workpiece cassette and unprocessed workpiece cassette on the work table 1 are displayed on the display of the processing device, or when there is only one unprocessed workpiece cassette on the workpiece table, For example, a warning sound for urging cassette replacement can be generated to prevent the apparatus from being stopped due to forgetting to replace the cassette.

The typical perspective view which shows the principal part of this invention Perspective view showing details of loader hand Figure showing the cassette from the direction of arrow A in FIG. Schematic perspective view showing the main part of the centering machine

Explanation of symbols

1 Work table 2 Processing stage 4 Loader hand 9 Disc
20 Control unit
23 cassettes
27 Locking device

Claims (3)

The machining stage (2), the work table (1) adjacent to the machining stage, and the disk-shaped work (9) housed in the cassette (23) to be loaded onto and removed from the work table are picked up from the cassette and processed. In a peripheral processing device for a disk-shaped workpiece, comprising a loader hand (4) for transporting to a stage (2),
A plurality of parallel horizontal guide rails (24) arranged on the work table are provided, and the cassette is guided by the guide rails and pulled out from the side on the work table. An apparatus for processing a peripheral edge of a disk-shaped workpiece.   The work table (1) includes a lock device (27) for fixing a cassette inserted into each guide rail for each pair of the guide rails, and a control device (20) for controlling the loader hand (4) The lock device (27) fixing the one cassette can be released when the workpiece take-out and return position is moved from one cassette to the next cassette. The peripheral processing apparatus as described.   The peripheral edge processing apparatus according to claim 1 or 2, wherein the work (9) is stored in the cassette (23) with its disk surface in the vertical direction.

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