JP2005271105A - Disk peripheral edge grinding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk peripheral edge grinding device for grinding inner and outer peripheral edges of a disk for use as a recording medium, which takes up only a small installation space and carries out peripheral edge grinding work of two procedures on the same machine. <P>SOLUTION: In the grinding device provided with a workpiece stand and a loader on a machine frame, two sets of machining units which are supported by a support frame formed in the machine frame to carry out operation independently from each other, are arranged. By arranging the two sets of machining units, which share the machine frame, the workpiece stand, and the loader, on a grinding device, two disks can be simultaneously machined in an installation area similar to the area taken up by a conventional grinding device having a single machining unit. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus for grinding a disk used as an information recording medium, and more particularly to an apparatus for grinding an inner peripheral edge and an outer peripheral edge of a disk held on a rotating work shaft.

  A peripheral grinding device for a disk having a general structure is such that a clamp device provided at the upper end of a work shaft grips both sides of the disk, rotates the work shaft, and is arranged adjacent to the work shaft. Is controlled in a direction parallel to the workpiece axis (Z direction) and in a direction close to and away from the workpiece (X direction) to perform inner and outer peripheral machining of the disk.

  The disk peripheral grinding device is provided with a work table for storing the disk before and after processing and a loader for carrying the disk, and a plurality of cassettes storing a large number of disks are mounted on the work table. Hold the disk one by one with the hand and load and unload the pre-processed disk and processed disk sequentially between the cassette on the work table and the processing position (position of the upper end of the work axis) on the work table. The inner and outer peripheral machining of a large number of discs is continuously performed.

  The loader hand extends toward the machining position in order to avoid interference with the disk clamper and other members at the machining position. The disk is sucked and held at the tip of this hand so that the disks in the cassette are sequentially processed. The processed disk is carried out to a cassette.

A conventional peripheral grinding device for a disk has a structure for processing one disk at a time, and has a structure in which a work base and a loader are provided in one processing unit including a work shaft, an outer peripheral grinding stone, and an inner peripheral grinding stone. there were.
Japanese Patent Laid-Open No. 2003-312841

  Disks as recording media such as CDs, DVDs and MDs are widely used, and the diameter and cost of the disks have been reduced. As a result, it is strongly required to reduce the size of the grinding device, reduce the installation area, and improve the throughput. ing. Further, an example in which the peripheral edge processing that has conventionally been performed in one step is performed in two steps of roughing and finishing is increasing.

  Since machine tools need rigidity to guarantee the required machining accuracy, there is a certain limit to the miniaturization of the machine even if the disk has a small diameter. The disk peripheral grinding device is the same, and even if the disk diameter is halved, the installation area of the machine cannot be halved. On the other hand, if the number of processed disks is increased or the peripheral grinding is performed in two steps, the number of machines installed increases, so that a demand for reducing the installation space per unit arises.

  An object of the present invention is to provide a peripheral grinding device for a disk with a small installation space, and to provide a peripheral grinding device capable of processing on the same machine even when peripheral grinding of the disk is performed in two steps.

  The disk peripheral grinding apparatus according to the present invention is supported by a support frame 4 formed on the machine frame by a peripheral grinding apparatus having one work table 1 and a work loader 12 on the machine frame and independent of each other. By providing the two sets of processing units 2a and 2b that operate as described above, the above-described problems are solved.

  The disk peripheral grinding apparatus of the present invention is provided with two sets of processing units 2a and 2b sharing the machine frame 3, the work table 1 and the loader 12 close to both sides of the support frame 4 of the machine frame. A grinding apparatus capable of simultaneously processing two disks in parallel has been realized with a smaller footprint than a conventional grinding apparatus having only one processing unit.

  That is, the disk peripheral grinding device according to the first aspect of the present invention is supported by one work table 1, a loader 12 for conveying the disk from the work table to a processing position, and a machine frame 3 common to the work table. And two sets of processing units 2a and 2b that operate independently of each other.

  A peripheral grinding apparatus for a disk according to a preferred embodiment of the invention of claim 2 includes a work table 1 for storing a disk before and after processing, a loader 12 for conveying the disk on the work table, and a support adjacent to the work table. A frame 4, work shafts 5 arranged parallel to each other on the left and right or upper and lower sides of the support frame with the work table adjacent to each other, and arranged on both sides of the support frame 4 and guided in directions orthogonal to each other. The outer peripheral grindstone 6 and the inner peripheral grindstone 7, the outer peripheral grindstone and its rotation drive motor 45 are located on the side opposite to the workpiece shaft of the workpiece shaft, and the inner peripheral grindstone 7 and its rotation drive motor. 46 is located above the workpiece axis.

  According to the grinding apparatus of the present invention, a machine having a processing efficiency of two machines can be installed in a conventional installation space for one machine, and the installation space can be reduced to about half or less of the conventional machine. That is, according to the configuration of the present invention described above, two sets of processing units 2a and 2b are arranged on one side of a practical rectangular work table 1 in a device arrangement that fits within the width of the work table. The disk peripheral grinding device provided with one work table 1 and loader 12, two work shafts 5, and two outer peripheral grindstones 6 and inner peripheral grindstones 7 respectively in plan view. It can be stored on a substantially rectangular machine frame.

  Especially when a large number of disc peripheral grinding devices are installed in the factory, there is no waste on the floor, and loading and unloading of cassettes with discs on the work table is performed as before. Can do. Therefore, as a whole factory, the number of installed peripheral edge grinding devices can be halved, and the machine installation area can be greatly reduced.

  Further, when the peripheral edge of the disk is processed in two steps, the first step and the second step can be performed continuously on the same machine, so the cassette is transferred from the first step machine to the second step machine. This saves the labor of transporting and saves labor and improves productivity.

  Hereinafter, a peripheral grinding apparatus for a disk according to the present invention will be described in detail with reference to the drawings. 1 is a schematic perspective view of the entire apparatus, FIG. 2 is an overall plan view, FIG. 3 is a perspective view of a loader, FIG. 4 is a schematic side view of a processing unit, a work shaft and a work clamping mechanism, and FIG. It is a top view. The clamping device 8 shown in FIG. 4 is shown with a phase shift of about 90 degrees for ease of understanding.

  As shown in FIGS. 1 and 2, the peripheral grinding apparatus for a disk according to the present invention includes a planar rectangular work table 1 and two processing units 2 a and 2 b arranged outside one side thereof. The two processing units 2 a and 2 b are respectively arranged on both sides of a column (support frame) 4 of a machine frame 3 that is substantially integrated with the work table 1. Each processing unit 2 includes a work shaft 5, an outer peripheral grindstone 6, and an inner peripheral grindstone 7, and an inner periphery of a disk (work) fixed to the upper end of the work shaft 5 by a clamping device 8. The outer periphery is processed at the same time.

  The unprocessed and processed disk 9 is mounted on the work table 1 while being accommodated in a cassette 10. The cassette 10 is a box-shaped container having an open upper surface and provided with longitudinal guide rails at equal intervals on the inner side surface, and the disk is placed in each cassette 10 in a state where its surface is arranged in a perpendicular direction. Is housed in.

  At a position adjacent to the processing units 2a, 2b above the work table 1, a centering table 11 for the unprocessed disk and a drying device 21 for the processed disk are arranged. A loader 1 for conveying a disk between a work table and a machining unit is shown in FIG. The loader 12 shown in the figure includes two hands, ie, a main hand 13 and an auxiliary hand 14, and each hand includes a suction pad 15 that vacuum-sucks the disk 9 at its tip. The main hand 13 is rotatable around a horizontal axis 16 and is connected to a rod of the swing cylinder 17. The main hand 13 is moved in the horizontal direction shown in the figure by the advance and retreat of the rod 17 a of the swing cylinder 17. The direction can be changed to a downward direction rotated downward by 90 degrees. The main hand 13 and the auxiliary hand 14 are provided on a carrier 18 that moves in a two-dimensional direction (XY direction) above the work table 1 so as to be movable up and down. The lift guide 19 of the main hand 13 has a large stroke, while the lift guide 20 of the auxiliary hand 14 has a small stroke.

  The pre-processed disk accommodated in the cassette 10 on the work table 1 with the surface vertical is sucked by the suction pad 15 of the main hand 13 which has been moved downward and moved downward, and then the main hand 13 is raised. , Pulled out from the cassette 10. Next, the disk 9 is placed on the centering table 11 by moving the carrier 18 with the main hand 13 in the horizontal direction. The disk 9 is centered on the centering stand 11 and again sucked by the suction pad 15 of the main hand 13. Next, the carrier 18 moves to either side of the processing units 2a and 2b, sucks and holds the processed disk by the auxiliary hand 14, and moves the disk before processing that is moved sideways and sucked to the main hand 13 by the processing. Supply to the machining position at the upper end of the work shaft 5 of the unit. The processed disk 9 adsorbed by the auxiliary hand 14 is conveyed to the drying device 21, and after removing and evaporating the grinding liquid (water) with dry air, it is adsorbed by the main hand 13 and accommodates the processed disk. It is transported onto the cassette and accommodated in the cassette by the downward movement and lowering movement of the main hand 13.

  Since the disk peripheral grinding apparatus of the present invention includes the two processing units 2a and 2b, the pre-processing disk accommodated in the work table 1 can be alternately supplied to the two processing units. Therefore, the machining can be performed twice as fast as the conventional apparatus having only one machining unit, and the productivity is greatly improved.

  When roughing is performed on one of the two processing units 2a and 2b and finishing is performed on the other, the roughened disk is sucked from the roughing unit by the auxiliary hand 14 and sucked to the main hand 13 by the above-described operation. After supplying the pre-processed disk to the roughing unit, the carrier 18 is moved to the finishing unit, the finished disk is sucked by the main hand 13, and the roughened disk sucked by the auxiliary hand is finished. Supply to unit 2b. Then, the finished processed disk adsorbed to the main hand is conveyed to the drying device 21, and after drying, the disk is again adsorbed by the main hand 13 and stored in the processed disk cassette.

  According to the grinding method in which roughing and finishing are continuously performed on the same machine stand, centering and drying are performed only once, and the work table 1, the loader 12, the centering stand 11 and the drying device 21 are roughened. Since two processing units for processing and finishing can be shared, compared to the conventional method where roughing and finishing are performed by separate devices, the equipment installation area and equipment cost are greatly reduced and the processing efficiency is improved. Can be improved.

  Next, the detailed structure of the machining unit 2 will be described with reference to FIGS. Each processing unit 2 includes a work shaft 5, a clamping device 8, an outer peripheral grindstone 6, and an inner peripheral grindstone 7.

  The work shaft 5 includes an upper cup-shaped lower clamper 22 on which the disk is placed at the upper end, and a coolant joint 24 having a rotary joint 23 built in at the lower end is connected. A vacuum joint 25 is connected to the work shaft so as to be rotatable. The work shaft 5 has a pipe shape, and an air path communicates from the vacuum joint 25 to the mounting surface of the disk 9 of the lower clamper 22. A water channel communicates from the coolant joint 24 to a recess hole at the center of the upper surface of the lower clamper by a coolant pipe 30 fixed at the center of the inner diameter of the work shaft by the lower clamper 22 and the lower end of the work shaft 5. This water channel is for supplying a grinding fluid during grinding of the inner and outer peripheral edges of the disk.

  The work shaft 5 is pivotally supported by a bracket 29 fixed to the column 4, a lower clamper 22 integrated with the work shaft is positioned at the upper end of the bracket 29, and a pulley 26 is disposed at the lower end of the bracket 29 extending to the bottom surface of the column 4. Is attached. The vacuum joint 25 and the coolant joint 24 described above are installed below the pulley 26. The work shaft 5 is rotationally driven by a main shaft motor 28 via a belt 27 wound around a pulley 26.

  A vertical cylinder 31 is supported at the lower end of the work shaft 5 in a state of being suspended by a mounting frame 32, and a lifting frame 35 is connected to the tip of an upward rod 33 of this cylinder via a universal joint 34. Has been. The elevating frame 35 includes guide rods 36 parallel to the work shaft on both sides of the work shaft 5. The guide rod 36 is guided by a guide sleeve 38 fixed to the column 4 by a bracket 37 so as to be vertically movable. Yes. The ends of the two guide rods 36 are connected to each other by a connecting member 39, and a short cylindrical upper clamper 40 is supported at the center of the connecting member so as to be freely rotatable about the same axis as the workpiece shaft 5.

  The disk to be processed is conveyed onto the lower clamper 22 through the space between the two guide rods 36 by the loader. Then, by the operation of the cylinder 31, the elevating frame 35 is pulled downward, and the disk on the lower clamper 22 is held between the lower clamper 40 and the lower clamper 40. When the spindle motor 28 is rotated after the loader 12 is retracted, the workpiece sandwiched between the upper and lower clampers 22 and 40 at the upper end of the workpiece shaft 5 is rotationally driven. The inner peripheral grinding stone 7 descends through the hollow hole of the upper clamper 40 and grinds the inner peripheral edge of the workpiece.

  The grindstone shafts 41 and 42 on which the outer peripheral grindstone 6 and the inner peripheral grindstone 7 are mounted are respectively supported by the outer peripheral grindstone stand 43 and the inner peripheral grindstone stand 44, and the outer peripheral grindstone shaft 41 is the outer peripheral grindstone. The motor 45 is rotationally driven via a belt 47, and the inner peripheral grinding wheel shaft 42 is rotationally driven via a belt 48 by an inner peripheral grinding wheel motor 46. The outer peripheral grinding wheel base 43 and the inner peripheral grinding wheel base 44 are mounted on the vertical moving surfaces 49 and 50 guided in the horizontal direction (X direction) on the vertical surface of the column 4 so as to be movable in the vertical direction (Z direction), respectively. Has been. The lateral movement bases 49 and 50 and the outer and inner peripheral grinding wheel bases 43 and 44 are known screw feed mechanisms, that is, ball screws that are rotationally driven by lateral feed motors 51 and 52 and vertical feed motors 53 and 54. And the feed motors 51, 52, 53, 54 under NC control are moved between the disk machining position and the retracted position on the XZ plane, and the outer periphery and inner periphery of the disk 9 are moved. Grind to the desired shape and dimensions.

  In the apparatus of the present invention, a work shaft 5, a clamping device 8, an outer peripheral grindstone 6 and an inner peripheral grindstone 7 constituting the machining unit 2 are provided on both sides of a column 4 erected at the center of one side of the work table 1. Further, by arranging the outer peripheral grinding stone 6 having a large diameter on the side opposite to the work base of the work shaft 5, the two processing units 2a and 2b can be arranged compactly adjacent to one side of the work base 1. With the above structure, the planar shape of the entire machine including the two processing units and the work table is substantially rectangular, and the installation floor area is substantially the same as that of a conventional apparatus having only one processing unit. It is possible to do.

The perspective view which shows an example of the peripheral grinding apparatus of the disk of this invention Overall plan view of the apparatus of FIG. Loader perspective view Side view of processing unit Plan view of processing unit

Explanation of symbols

1 Work table
2a, 2b Machining unit 3 Machine frame 4 Column 5 Work shaft 6 Wheel for outer circumference 7 Wheel for inner circumference
12 Loader
45 Grinding wheel motor
46 Grinding wheel motor

Claims (2)

  One set of work table (1), a loader (12) for transporting a disk from the work table to a machining position, and two sets that are supported by a common machine frame (3) and operate independently of each other. A peripheral grinding apparatus for a disk, comprising the processing units (2a, 2b).   A work table (1) for storing the disk before and after processing, a loader (12) for conveying the disk on the work table, a support frame (4) adjacent to the work table, and the work table adjacent to each other. Work shafts (5) arranged parallel to each other on the left and right or upper and lower sides of the support frame, and an outer peripheral grindstone (6) arranged on both sides of the support frame (4) and guided in directions orthogonal to each other And the inner peripheral grindstone (7), the outer peripheral grindstone and its rotation drive motor (45) are located on the opposite side of the workpiece shaft, and the inner peripheral grindstone (7) and its rotation drive motor. (46) is a peripheral grinding device for a disk, which is located above the workpiece shaft.

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