JPH0929506A - Blank supplying device for magnetic disc substrate to lathe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blank supplying device for magnetic disc substrate laminated without using any interposing paper to a lathe by peeling the blank one by one by an air blowing device. SOLUTION: A holding member for holding or attracting only one from a top surface of a plurality of blanks 1 directly and vertically laminated without using any interposing paper by at least two parts or more of positions is provided on a bottom end surface of an arm 4 and an air knife 6 for promoting releasing of the blanks of the top surface from the lower blank by blowing the air from its parallel direction is provided in a part of a designated thickness of one blank held by the holding member. When two or more blanks are not released the air knife and which are laminated to each other, a mechanism for sensing this and stopping supply of the blanks to a next step is mounted so as to prevent supply of the blanks to the next step with the blanks of the top surface and the lower being attracted without releasing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blank for a magnetic disk substrate, particularly aluminum or its alloy (hereinafter,
The present invention relates to a device for supplying blanks made of aluminum) one by one to a lathe turning process which is the next process.

[0002]

2. Description of the Related Art Conventionally, a blank for an aluminum magnetic disk substrate punched from a rolled coil is laminated on top and bottom when it is supplied to the next step of surface finishing including lathe turning, gliding, polishing and the like. , And then supplied to the lathe one by one. At this time, since the flatness of the blanks is as small as a few microns and the surface is also smooth, when stacking multiple blanks, they are separated one by one by the suction force due to the direct contact between the upper and lower surfaces of the vertically adjacent blanks. Supply becomes difficult. Therefore, conventionally, by inserting a slip sheet between the blanks, the suction force between the blanks is relaxed and a plurality of blanks are prevented from being simultaneously supplied to the lathe.

[0003]

According to the conventional means as described above, in order to feed the blanks stacked one above the other to the lathe, the interleaving paper inserted one by one must be removed each time. The mechanism for that is essential.
A suction cup system is generally used as a mechanism for removing the interleaving paper, and the presence or absence of the interleaving paper is confirmed by conduction, and the next operation is performed.
It was outputting an on / off signal. However, in such a conventional method, there is a possibility that troubles such as a temporary stop of the operation may occur due to a suction error, an electrical defect, etc., which has been a factor of lowering the operation rate of the apparatus. Further, there is a problem in that the slip sheet inserting work and the slip sheet itself are costly, leading to an increase in cost.

It is an object of the present invention to provide an apparatus capable of supplying a single blank from a plurality of stacked blanks without interposing interleaving paper.

[0005]

A device for supplying a blank for a magnetic disk substrate to a lathe according to the present invention is a lathe machine in which a plurality of stacked donut-shaped aluminum magnetic disk substrate blanks are gripped one by one by an arm. In the device for supplying to the next step such as the above, the arm is provided with a gripping member that grips or adsorbs only one uppermost surface of the blanks stacked directly above and below without interposing interleaving paper at at least two or more sites. An air knife, which is provided on the lower end surface and which jets air from the horizontal direction to a predetermined thickness portion of one blank that is gripped and lifted by this gripping member to promote separation between the uppermost surface and the blank on the lower surface, By solving the above problems, the above problems are solved. In the present invention, when two or more blanks are kept overlapping without peeling even by the air knife, if a mechanism for detecting the blank and stopping the supply of the blank to the next step is additionally provided, It is possible to prevent the blank and the blank immediately below the blank from being supplied to the next step while being adsorbed without being separated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the outline of the apparatus of the present invention. In FIG. 1, reference numeral 1 is a blank for a magnetic disk substrate made of an aluminum alloy (A5086). A plurality of sheets are directly stacked on top of each other without being interposed and placed on the blank stocker 2.
Similarly, three to four guides 3 are erected on the blank stocker 2 so that the blank stocker 2 is laminated so as not to be displaced left and right. In addition, blank stocker 2 is blank 1.
It is configured to move up and down according to the number of sheets. A rotatable arm 4 for supplying the blank 1 to the next step is provided on the upper part of the blank 1, and a suction cup 5 as a gripping member is provided on the lower end surface of the arm 4 for stacking the stacked blanks 1. Only the blank 1 on the uppermost surface is sucked and gripped, and the blank 1 can be supplied to the next step such as a lathe. Further, as can be seen from FIG. 2 showing a partially enlarged view of the air knife 6 of FIG. 1, an air knife 6 whose tip extends into the center hole of the donut-shaped blank 1 is provided on the lower end surface of the arm 4. At the tip of the air knife 6, a plurality of air injection ports 9 for injecting air in the horizontal direction downward by a thickness of about one blank 1 are provided at the same angle in the same horizontal plane. In such an apparatus, the uppermost blank 1 stacked by the suction cup 5 provided on the lower end surface of the arm 4 is sucked. In this case, peeling between the uppermost blank and the lower blank directly in contact with the uppermost blank is performed by sucking and gripping the uppermost blank by the suction cup 5 and slightly lifting the uppermost blank, or by slightly lowering the blank stocker 2. At the same time or after that, air is horizontally ejected from a plurality of ejection ports 9 of the air knife 6. As a result, the blank adsorbed on the lower surface of the uppermost blank 1 adsorbed by the suction cup 5 of the gripping member is peeled off, and only one uppermost blank is gripped by the arm 4 and supplied to the next step such as a lathe.

FIG. 3 shows an example of an apparatus showing another embodiment of the present invention. In this FIG. 3, a collet chuck 7 is used as a holding member provided on the lower end surface of the arm 4 instead of the suction cup 5 shown in FIG.
The collet chuck 7 shown in FIG.
Is configured to grip only the uppermost blank 1 in the center hole. Further, in FIG. 3, a plurality of air knives 6 are arranged, and air can be jetted from the air jet ports 9 of these air knives 6 to the outer peripheral surface portion between the uppermost blank lower surface and the blank upper surface immediately below it in the horizontal direction. Is configured. As can be seen from FIGS. 1 to 3, it is needless to say that the arrangement of the gripping member or the air knife 6 and the like can be changed in design as appropriate from the spirit of the present invention.

Despite the above-described step of holding the blank 1, when two or more blanks are held by the arm 4 without being peeled off, a sensing member 8 for sensing the suction of two or more blanks. Can be provided. For example, FIG. 4 shows a form in which a laser system is attached as the sensing member 8. In this example, a laser emission unit 10 is provided so that the laser beam hits the outer peripheral surface of the second blank 1 from the top, and the laser beam reflected by the increase in the blank thickness caused by the adsorption of two or more blanks is The light receiving unit 11 that receives light may be configured to be able to detect the adsorption of two or more blanks. According to this structure, when only the uppermost blank 1 is peeled off and gripped by the arm 4, the laser light does not reach the light receiving section 11 and the operation is continued as it is. When the suction of the blank is detected, the operation switch of the supply device is turned off, so that the supply of the blank to the lathe etc. one by one is secured.

FIG. 5 shows an example in which a touch sensor system is adopted as the sensing member 8. In the example shown in FIG. 5, the distance a shown as the tip position of the sensor 12 is set to be slightly smaller than that for one blank, and when the sensor 12 detects a blank, the operation switch of the present supply device is turned off. Try to

FIG. 6 shows an example in which a capacitance type is adopted as the sensing member 8. In the example shown in FIG. 6, the plate thickness is measured by the sensor 13, and when the plate thickness exceeds the specified value, the operation switch of the present supply device is turned off.

[0011]

According to the present invention as described above, when a plurality of blanks for aluminum magnetic disk substrates stacked vertically are supplied one by one to the lathe turning process of the next process, the air is blown by the air knife. Since the method is used, it is possible to securely hold the blanks one by one without inserting the interleaving paper between the blanks, which is almost the same as when inserting the conventional interleaving paper. The troubles of checking and removing and troubles such as device operation stop due to electrical troubles are solved, and the cost of inserting the interleaf sheet, the cost of the interleaf sheet itself, etc. become unnecessary, and it is extremely cheap and lathe with simple labor A reliable supply of blanks one by one is ensured.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing an outline of one embodiment of a device of the present invention.

FIG. 2 is an explanatory sectional view of a main part of FIG.

FIG. 3 is a cross-sectional explanatory view of a main part showing the outline of another embodiment of the device of the present invention.

FIG. 4 is a perspective explanatory view showing one form of a sensing member for sensing the presence of two or more blanks.

FIG. 5 is a perspective view showing another form of a sensing member for sensing the presence of two or more blanks.

FIG. 6 is a perspective explanatory view showing another form of a sensing member for sensing the presence of two or more blanks.

[Explanation of symbols]

 1 Blank 2 Blank stocker 3 Guide 4 Arm 5 Sucker 6 Air knife 7 Collet chuck 8 Sensing member 9 Air injection port 10 Laser emitting part 11 Light receiving part 12 Sensor 13 Sensor

Claims (3)

[Claims] 1. A device for gripping a plurality of donut-shaped aluminum magnetic disk substrate blanks stacked one by one by an arm and supplying them to the next step such as lathe processing, directly laminating them vertically without interposing interleaving paper. The lower end surface of the arm is provided with a gripping member that grips or adsorbs only one of the uppermost surfaces of the blanks, which has a predetermined thickness portion for one blank held by the gripping members. An apparatus for supplying a blank for a magnetic disk substrate to a lathe, characterized by comprising an air knife for injecting air from the horizontal direction to promote separation between the blank on the uppermost surface and the blank on the lower surface. 2. A sensing member that senses that two or more blanks are adsorbed by sensing that the thickness of the blank gripped by the gripping member is thicker than a predetermined thickness of one blank, and a sensing member. The apparatus for supplying a blank for a magnetic disk substrate to a lathe according to claim 1, further comprising a mechanism for stopping the operation of the apparatus when two or more blanks are attracted by the sensing member and gripped by the gripping member. 3. The sensing member is one of a laser type, a touch sensor type and a capacitance type.
A device for supplying a blank for a magnetic disk substrate to the lathe described.