JPH0551555U - Disk inner diameter polishing and grinding equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Mainly to speed up the inner diameter processing of glass hard disks and to finish the inner peripheral surface flat and accurately. [Structure] It is assumed that a holder for disc work is slidably provided so as to face the frame body, and a core drill for cutting the inner diameter of the disc work is also provided so as to face each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for polishing and grinding the inner diameter of a disk, in particular, a donut-shaped glass hard disk used as a recording medium.

[0002]

[Background of the invention]

 Generally, the above-mentioned glass hard disk holds a roughly prototype work piece with a holder, and grinds and grinds the inner diameter from one direction with a grinder and a core drill.

[0003]

[Problems to be solved by the device]

 However, according to the above-described conventional processing method, burrs are increased on one side, especially on the lower side, making it difficult to perform stable and highly accurate processing.

[0004]

[The purpose of the device]

 Therefore, the present invention has been made by paying attention to the problems of the conventional technique, and it is an apparatus for polishing and grinding the inner diameter of a disk which can eliminate such problems and easily form a flat inner diameter surface with high accuracy. Is intended to provide.

[0005]

[Means for Solving the Problems]

 In order to achieve this object, a disk inner diameter polishing and grinding apparatus according to the present invention is provided with a disk work holding holder slidably opposed to a frame body, and a core drill for cutting the inner diameter of the disk work. It is also characterized by the fact that they are equipped opposite each other.

[0006]

[Action]

 With the above structure, the prototype work is ground and ground from both sides, speeding up the work time, and the burr (remaining part) on the inner peripheral surface becomes a uniform annular projection. By moving the core drill within a few millimeters, the burr (remainder) can be scraped off, and a flat inner diameter surface can be formed.

[0007]

【Example】

 Next, an example of implementation of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an essential part of a disk inner diameter polishing and grinding apparatus according to the present invention, FIG. 2 is a front view of the same holder, and FIG. ..

In these drawings, reference numeral 1 denotes a cast frame body installed on a mounting table, and the frame body 1 is integrally connected at its upper portion by a bridge body 2 in order to prevent delicate tilting, The walls are facing each other.

Clamp shafts 3, 3 are slidably penetrated through the frame body 1 so as to face each other. In the case of the present embodiment, the clamp shafts 3, 3 are slid into the frame body 1. The rack gears 4 and 4 to be arranged are used to drive and brake. Furthermore, a stopper is provided at the rear end of the clamp shafts 3, 3 described above, and a through hole is formed substantially at the center, and this through hole is connected to the valve connected to the vacuum pump at the rear end. ..

Reference numeral 5.5 in the figure is a holder having an outer diameter slightly smaller than that of the expected work A. The holder 5.5 is detachably attached to the tip of the clamp shaft 3.3. Intake holes 6, 6, ... Which communicate with the through holes of the clamp shaft 3 are formed inside.

Further, the holder 5 is formed in a ring shape having a through hole 7 through which a core drill, which will be described later, passes is formed in the center thereof, and glass shavings generated during processing are dropped below the holder 5. The notch 8 is formed.

On the other hand, reference numeral 9-9 in the figure denotes a core drill provided opposite to the frame body 1, and the core drills 9 and 9 are attached to the shafts 10 and 10, respectively. By sliding the core drills 9 and 9, the inner diameter (through hole) B is simultaneously advanced from both sides of the work A to the target portion of the work A for molding.

By the core drills 9 and 9 described above, the inner diameter (through hole) B12 of the work A leaves an annular burr (remainder) 11 having a chevron cross section as shown in FIG. The burr (residual portion) 11 is scraped off neatly by simply moving the inner diameter (through hole) B for several millimeters, and a flat inner peripheral surface (through hole) is formed.

[0014]

[Effect of the device]

 The disk inner diameter polishing and grinding apparatus according to the present invention is constructed and used as described above. As a result, the working speed is significantly increased, the inner diameter of the finished disc has an accurate flat inner peripheral surface, the accuracy is improved, and the rate of defective products is extremely small.

[Submission date] March 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content] [Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for polishing and grinding the inner diameter of a disk, in particular, a toroidal glass hard disk used as a recording medium.

[0002]

[Background of the invention]

 In general, the above-mentioned glass hard disk holds a rough prototype work piece by a holder, and grinds and grinds the inner diameter from one direction with a grinder and a core drill.

[0003]

[Problems to be solved by the device]

 However, according to the above-described conventional processing method, burrs are increased on one side, especially on the lower side, making it difficult to perform stable and highly accurate processing.

[0004]

[The purpose of the device]

 Therefore, the present invention has been made by paying attention to the problems of the conventional technology.The inner diameter of a disk that can eliminate such problems and easily form a flat inner diameter surface with high accuracy, The purpose is to provide a grinding machine.

[0005]

[Means for Solving the Problems]

 In order to achieve this object, the disk inner diameter polishing / grinding apparatus according to the present invention is characterized in that it is slidably provided with a core drill facing the frame body and cutting the inner diameter of the disk work.

[0006]

[Action]

 With the above configuration, the inner diameter of the prototype work is polished and ground from both sides, speeding up the work time, and making the burr (remaining part) on the inner peripheral surface uniform. By moving the core drill by several millimeters within the inner diameter, the burr (remaining part) can be scraped off and a highly accurate flat inner diameter surface can be formed.

[0007]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an essential part of a disk inner diameter polishing / grinding device embodying the present invention, FIG. 2 is a plan view of the same, FIG. 3 is an essential part sectional view showing a second embodiment, and FIG. FIG. 5 is a front view of a holder showing a third embodiment, FIG. 5 is a front view of a holder, and FIG.

In these drawings, reference numeral 1 denotes a cast frame body placed on a mounting table, and the frame body 1 has wall portions 2 and 2 facing each other integrally provided upright. Spindles 4 and 4 having core drills 3 and 3 at the tips are provided on the respective wall portions 2 and 2, and cutting oil is passed through pipes 5 and 5 inside the spindles 4 and 4, respectively. It is designed to smoothly process the inner diameter of the. Reference numerals 6 and 6 are stoppers for the spindles 4 and 4.

Further, rack gears 7 and 7 are formed on the spindles 4 and 4, and the rack gears 7 and 7 are engaged with the pinions 8 and 8 respectively so that they are slid in the contact and separation directions. It has become.

Further, reference numeral 9 in the drawing denotes a fixed air cylinder, and a pair of arms 10 and 10 are attached to the air cylinder 9, and a holder for sandwiching the prototype work A at the tips of the arms 10 and 10. 11 and 11 are attached. That is, the holders 11 and 11 are positioned by the arms 10 and 10 to suppress the shake of the core drills 3 and 3. At this time, the frame 1 provided with the spindles 4 and 4 is supposed to move several millimeters to several tens of millimeters.

Further, the holder 11 used here has a notch 12 for lowering the shavings of the prototype work A in the lower portion, and in the case of the second and third embodiments, etc. Pins 13, 13 for positioning and supporting the work A at three points are provided, but at that time, the notch 12 is not formed due to the difference in the mounting structure.

On the other hand, in the case shown in FIG. 3, the cross roller slider 14 is attached to the valley portion of the frame body 1, and the holder plate 15 is erected on the cross roller slider 14. Suction ports 16, 16 ... Are formed in the holder plate 15, and a pipe 17 connected to a vacuum pump is connected to the suction ports 16, 16 to vacuum-chuck the prototype work A.

In addition, in the case shown in FIG. 4, the structure shown in FIG. 3 is further devised, and a retaining ring 18 is fitted to one of the spindles 4, and a holder which can be slid at the tip of the spindle 4 is provided. 19, a coil spring 20 is elastically provided between the holder 19 and the locking ring 18.

In the case shown in FIG. 4, in addition to chucking by the holder plate 15, the prototype work A is clamped by the holder 19 and the inner diameter is machined by the core drills 3, 3. Further, the cross roller slider 14 on which the holder plate 15 is erected is fixed at the time of chucking, but the fixation of the cross roller slider 14 is released when the core drill 3 is stopped by the stopper 6.

Further, as shown in FIG. 6, the work A whose inner diameter is machined by the apparatus according to the present embodiment has a mountain-shaped annular burr (residual portion) 21 formed on the inner diameter B, and this burr is formed. The (remaining part) 21 is scraped off by moving one core drill 3 within this inner diameter B for several millimeters.

[0016]

[Effect of the device]

 The disk inner diameter polishing and grinding apparatus according to the present invention is constructed and used as described above. Since the core drill works from both sides of the prototype work, the working time is greatly shortened, the efficiency is improved, and burrs can be removed cleanly, so that a highly accurate flat inner diameter surface can be formed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of an inner diameter polishing and grinding device for a disk embodying the present invention.

FIG. 2 is a front view of a holder.

FIG. 3 is a cross-sectional view showing an inner diameter state of a disc before final processing.

[Explanation of symbols]

 1 Frame 3 Clamp Shaft 4 Rack Gear 5 Holder 8 Notch 9 Core Drill 11 Burr A Work B Inner Diameter

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[Procedure amendment]

[Submission date] March 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of device] Internal diameter polishing and grinding device for disk

[Scope of utility model registration request]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of an inner diameter polishing and grinding device for a disk embodying the present invention.

FIG. 2 is a plan view.

FIG. 3 is a cross-sectional view of essential parts showing a second embodiment.

FIG. 4 is a sectional view of an essential part showing a third embodiment.

FIG. 5 is a front view of a holder.

FIG. 6 is a cross-sectional view showing a state of the inner diameter of the work before the final processing.

[Explanation of symbols] 1 frame 3 core drill 4 spindle 7 rack gear 9 air cylinder 10 arm 11 holder 12 notch 13 pin 14 cross roller slider 15 holder plate 19 holder 20 coil spring

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Added

[Correction content]

[Figure 4]

[Procedure Amendment 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

[Figure 5]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Added

[Correction content]

[Figure 6]

Claims (3)

[Scope of utility model registration request] 1. An inner diameter of a disc, wherein a holding holder for the disc work is slidably provided so as to face the frame body, and core drills for cutting the inner diameter of the disc work are also provided so as to face each other. Polishing and grinding equipment. 2. The inner diameter polishing and grinding apparatus for a disk according to claim 1, wherein the holding holder has a through hole formed therein, the through hole communicating with the intake hole, and is slid by a rack gear. 3. The disk inner diameter polishing / grinding device according to claim 1, wherein the holding holder has a cutout portion for grinding and dropping formed in a lower portion thereof.