JP2008168358A - Spherical body processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To process a workpiece of glass or ceramic or the like to a stable and high-quality spherical body. <P>SOLUTION: The spherical body processing device 10 is equipped with: a first motor 38; a circular disk 28 which is rotationally driven by the first motor 38 and places the workpiece 33; a cylindrical side wall 30 which is disposed on the same axis of the circular disk 28 and forms a processing tank 32 with the circular disk 28; a direction changing member 34 which forcibly changes the moving direction of the workpiece 33 by allowing the workpiece 33 charged in the processing tank 33 to collide and forcibly changes the moving direction of the workpiece 33 to change a contact portion with the cylindrical side wall 30; a clearance space 31 which is formed between the circular disk 28 and the cylindrical side wall 30 and discharges dust; and abrasive grains which are adhered to the circular disk 28 and the cylindrical side wall 30 to process the workpiece 33. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sphere processing apparatus, and more particularly to a sphere processing apparatus that processes a workpiece made of a brittle material such as glass or ceramic into a spherical shape.

  Conventionally, sphere processing for processing a workpiece made of a brittle material such as glass or ceramic into a sphere has been performed by, for example, a barrel processing apparatus. In this barrel processing apparatus, a cube-shaped workpiece (hereinafter referred to as “work”) cut out from a block material or the like can be processed into a spherical shape. In other words, this barrel processing device is used to put a large number of workpieces into a container having abrasive grains such as diamond adhered to the inner surface, roll the numerous workpieces as the container rotates, and process it into a sphere. is there.

  However, this machining method requires a long time for machining work because the rolling trajectory of the workpiece is uniform. Therefore, in order to overcome this time disadvantage, for example, the processing technique of Patent Document 1 has been proposed.

  The processing apparatus of Patent Document 1 includes a cylindrical container into which a workpiece is placed, covers the upper surface opening of the cylindrical container with a lid, and attaches abrasive grains such as diamond to the bottom and side surfaces of the container. . In addition, a vacuum nozzle for sucking upward dust generated in the cylindrical container as the workpiece is processed is connected to the center of the lid.

And at the time of a process, many workpiece | works are thrown in in a cylindrical container, and after closing a lid | cover, this cylindrical container is rotated. Thus, by rotating the cylindrical container, a large number of charged workpieces rotate and revolve. At this time, the internal workpieces and the workpiece, the cylindrical side wall, and the cylindrical bottom surface come into contact with each other. By this contact, the corner portion of the workpiece is scraped off and the workpiece is processed into a sphere. The dust generated in the cylindrical container is removed by suction through a vacuum nozzle connected to the center of the lid.
JP 2006-35334 A

  However, in Patent Document 1, when the cylindrical container is rotated at a low speed, the rotation of the loaded workpiece is biased. For this reason, there is a problem that only the same part of the work is cut, and the spherical shape of the work is broken. In order to prevent dust generated during processing from adhering again to the workpiece, it is sucked by a vacuum nozzle, but the dust outlet is provided at the top of the cylindrical container. Had to be lifted up and sucked.

  In addition, relatively large fragments generated during machining, such as cracking or chipping of the workpiece, cannot rise up and cannot be discharged by suction. For this reason, the debris would come into contact with other workpieces and induce new cracks and chips.

  Furthermore, since the glass powder having such a size as to fall off immediately after being swollen cannot be discharged, the powder remains on the abrasive grain surface. The remaining powder leads to clogging of the abrasive grains, making it difficult to perform stable processing.

  The present invention has been made to solve such a problem, and an object thereof is to provide a sphere processing apparatus capable of processing a brittle material such as glass and ceramics into a stable and high-quality sphere.

In order to achieve the object, the invention according to claim 1
In a sphere processing device that processes a workpiece made of a brittle material such as glass or ceramic into a sphere,
First driving means;
A disk that is rotationally driven by the first driving means and places the workpiece;
A cylindrical side wall disposed coaxially with the disk and forming a processing tank with the disk;
A moving direction changing means for forcibly changing the moving direction of the work by colliding the work put in the processing tank, and changing a contact portion between the work and the cylindrical side wall;
A gap space formed between the disk and the cylindrical side wall for discharging dust,
And an abrasive that is attached to at least one of the disk and the cylindrical side wall to process the workpiece.

The invention according to claim 2 is the sphere processing apparatus according to claim 1,
The moving direction changing means is fixedly attached to the cylindrical side wall.

The invention according to claim 3 is the sphere processing apparatus according to claim 1,
A second driving means for rotating the moving direction changing means is provided.
The invention according to claim 4 is the sphere processing apparatus according to claim 3,
The moving direction changing means is arranged to be rotatable in the direction opposite to the rotating direction of the disk.

The invention according to claim 5 is the sphere processing apparatus according to claim 1,
The moving direction changing means includes an elastic body, a leaf spring, a synthetic resin, or a metal rod.

The invention according to claim 6 is the sphere processing apparatus according to claim 1,
The cylindrical side wall is fixed to the disk.
The invention according to claim 7 is the sphere processing apparatus according to claim 1,
A third drive means for rotationally driving the cylindrical side wall is provided.

The invention according to claim 8 is the sphere processing apparatus according to claim 7,
The cylindrical side wall rotates in a direction opposite to the rotation direction of the disk.
The invention according to claim 9 is the sphere processing apparatus according to claim 1,
The gap space communicates with an exhaust flow path formed below between the disk and the cylindrical side wall.

The invention according to claim 10 is the sphere processing apparatus according to claim 1 or 9, wherein
The gap space has a size less than a radius of a sphere obtained by processing the workpiece.

The invention according to claim 11 is the sphere processing apparatus according to claim 9,
The exhaust passage is connected to a dust exhaust device.
The invention according to claim 12 is the sphere processing apparatus according to claim 9 or 11,
The exhaust flow path has an annular groove formed coaxially with the disk.

  According to the present invention, a brittle material such as glass or ceramics can be processed into a stable and high-quality sphere.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a cross-sectional front view of a main part in which a cross-section of the main part of the sphere processing apparatus of the present embodiment is hatched, and FIG. 2 is a cross-sectional view taken along the line II-II.

  In the sphere processing apparatus 10, a base plate 14 is installed on a frame-like gantry 12, a spindle cylinder 16 extending in the vertical direction at the center of the base plate 14, and a spindle lid 18 is provided on the upper end surface of the spindle cylinder 16. It has been. Bearings 20 and 20 are attached to the spindle cylinder 16 inside the opening portions at both ends. A stepped shaft 22 extending in the vertical direction is rotatably supported by the bearings 20 and 20. An oil seal 24 is interposed between the inner diameter portion of the spindle lid 18 and the outer peripheral portion of the shaft 22.

  A cylindrical base block 26 is fixed on the base plate 14 so as to be coaxial with the spindle cylinder 16, and an annular groove 26a is formed in the upper part thereof. Further, a disc 28 is fixed to the upper end portion of the shaft 22 so as to be coaxial with the shaft 22. A cylindrical cylindrical side wall 30 is placed so as to surround the outer peripheral portion of the disc 28 from the periphery, with a predetermined gap from the outer peripheral surface of the disc 28, and the lower end side of the circular plate 28 is placed on the upper portion of the base block 26. It is fixed in the drilled groove 26a. And the lower surface on the outer peripheral side of the disk 28 covers a part of the groove 26a, and a gap larger than a predetermined interval is formed on the lower surface side. The disc 28 and the cylindrical side wall 30 are arranged coaxially.

  Thus, a cylindrical processing tank 32 is formed by the upper surface of the disk 28 and the inner surface of the cylindrical side wall 30. At the time of processing, a work (workpiece) 33 is put into the processing tank 32 and processed. A gap space 31 is formed between the outer peripheral portion of the disk 28 and the inner peripheral portion (inner surface) of the cylindrical side wall 30 for discharging dust generated during processing.

  The work 33 is made of a brittle material such as glass or ceramics, and has a cube shape (cube, regular hexahedron) cut out from a block material, a cylindrical shape cut out from a bar, or the like.

  Further, unillustrated abrasive grains such as diamond are attached to the upper surface (work placement surface) of the disk 28 and the inner surface of the cylindrical side wall 30 by electrodeposition or the like. The abrasive grains may be attached to either the disk 28 or the cylindrical side wall 30. In the case of diamond abrasive grains, for example, coarse grains of # 60 to 80, and dense grains of # 400 are used. In addition, a direction changing member 34 as a moving direction changing means is vertically suspended from the inner surface of the cylindrical side wall 30 with its upper end supported by the upper surface of the cylindrical side wall 30. The lower end of the direction changing member 34 is not in contact with the disk 28.

  The direction changing member 34 is made of, for example, an elastic body such as rubber, a leaf spring, a synthetic resin, or a metal rod. The direction changing member 34 has a cross-sectional shape, for example, a circle, a square, a triangle, or the like. However, it is not limited to a specific shape. The direction changing member 34 collides with the direction changing member 34 when the work 33 put into the processing tank 32 moves in the processing tank with the rotation of the disk 28, so The moving direction is forcibly changed. In other words, the direction changing member 34 serves to change the contact portion between the workpiece 33 and the cylindrical side wall 30.

  On the other hand, a first motor 38 as a first driving means is fixed below the base plate 14. A pulley 36 is fixed to the output shaft 38 a of the first motor 38. A pulley 40 is fixed to the lower end of the shaft 22 described above. Further, a timing belt 42 is wound between the two pulleys 36 and 40. Thus, when the first motor 38 rotates, the disk 28 is driven to rotate.

  In addition, an annular exhaust passage 44 is formed coaxially with the disc 28 in the base block 26. The exhaust passage 44 is a groove that has a substantially U-shaped cross section. The exhaust passage 44 is provided at a position below the gap space 31 formed between the outer peripheral surface of the disk 28 and the inner surface of the cylindrical side wall 30.

  Furthermore, the width of the gap space 31 is set to a dimension smaller than the radius of the sphere after the workpiece 33 is processed. This is because if the width of the clearance space 31 is larger than the size of the sphere, the workpiece 33 enters the clearance space 31 or gets caught, making it difficult for the workpiece 33 to move.

  The exhaust passage 44 is an annular passage, and a nozzle 46 is fixed at a position on the tangent line as shown in FIG. The nozzle 46 is connected to a dust removal device (not shown). As a result, the processed dust that has fallen into the exhaust flow path 44 from the gap space 31 described above is sucked and discharged in the direction of arrow A by the dust discharger.

  Although FIG. 2 shows a case where two nozzles 46 are provided in the apparatus main body, the number is not limited. Further, as shown in FIG. 1, a labyrinth (not shown) is formed between the upper surface of the inner wall 26a of the base block 26 in which the exhaust passage 44 is formed and the lower surface of the disk 28 facing the wall 26a. Is formed. This labyrinth prevents machining dust generated in the machining tank 32 from entering the spindle cylinder 16 easily.

  Further, an air opening hole 48 is formed in the base plate 14. The air opening hole 48 is provided to make the pressure in the space 49 formed between the base plate 14, the base block 26, and the disk 28 the same as the atmospheric pressure. Although not shown, a lid that covers the upper end opening of the cylindrical side wall 30 may be attached from the viewpoint of safety of the apparatus. In this case, the direction changing member 34 can be fixed to the lid.

Next, a method for processing the workpiece 33 will be described.
At the time of processing, one or a plurality of workpieces 33 are put into the processing tank 32 and the first motor 38 is driven. Then, the driving force of the first motor 38 is transmitted to the pulley 40 via the pulley 36 and the timing belt 42, and the shaft 22 and the disk 28 are driven.

  As a result, the work 33 placed on the disk 28 moves outward by centrifugal force as the disk 28 rotates, and comes into contact with the inner surface of the cylindrical side wall 30. At this time, the work 33 rotates and revolves in the processing tank 32 due to a difference in relative speed between the disk 28 and the stationary cylindrical side wall 30.

  Due to this movement, the corner of the workpiece 33 is cut by contact with the diamond abrasive grains attached to the inner surface of the cylindrical side wall 30 and the upper surface (work placement surface) of the disk 28 and contact with other workpieces 33. It is processed into a sphere over time.

  Further, the work 33 that rotates and revolves collides with the direction changing member 34 and is once separated from the inner surface of the cylindrical side wall 30. Subsequently, the peeled workpiece 33 comes into contact with the inner surface of the cylindrical side wall 30 again by the centrifugal force accompanying the rotation of the disk 28. Thus, the moving direction of the workpiece 33 is forcibly changed, and the contact portion between the workpiece 33 and the cylindrical side wall 30 is changed each time.

  During the processing, the workpiece 33 is cut and glass dust is generated in the processing tank 32. However, the glass dust is sucked into the exhaust passage 44 from the gap space 31 between the cylindrical side wall 30 and the disk 28 and is collected by a dust exhaust device (not shown).

  In the present embodiment, for example, when the first motor 38 is driven or before the first motor 38 is driven, a dust exhaust device (not shown) is also driven. Then, the air in the processing tank 32 flows into the exhaust passage 44 through the gap space 31 between the cylindrical side wall 30 and the disk 28 and is sucked by the dust exhaust device. Even when the dust removal device is driven, since the air release hole 48 is formed in the base plate 14, the inner space 49 is maintained at atmospheric pressure.

In addition, relatively large debris generated by cracking or chipping of the work 33 is sucked from the gap space 31 between the cylindrical side wall 30 and the disk 28 and sucked by the dust removing device.
When the processing is completed, the work 33 is taken out from the processing tank 32. At this time, it is desirable to drive the dust removal device until the discharge of the work 33 is completed. This is to keep the surrounding environment clean.

  According to the present embodiment, by providing the direction changing member 34 inside the cylindrical side wall 30, the work 33 put into the processing tank 32 can be moved into the cylindrical side wall 30 many times as the disk 28 rotates. It can be peeled from the wall. For this reason, the work 33 does not have a biased rotation and revolution motion, but moves differently each time, and can be processed into a uniform sphere.

  In addition, dust can be discharged from the gap space 31 between the disk 28 and the cylindrical side wall 30, and this dust discharge position is close to the position of the work 33 and is positioned below, so that the generated dust is immediately discharged. be able to.

  Furthermore, since the gap space 31 between the disk 28 and the cylindrical side wall 30 is very small compared to the cross-sectional area of the machining tank 32, the vicinity of the abrasive grains in the vicinity of the gap space 31 in contact with the workpiece 33 being machined. The air flow rate is very fast. Therefore, the dust that has entered the gaps between the diamond abrasive grains can also be efficiently discharged. For this reason, clogging of abrasive grains can be prevented, and stable processing can be performed.

In addition, large fragments that are difficult to rise can be discharged from the gap space 31 described above, and cracking or chipping of the secondary workpiece 33 can be prevented. Further, when the processing is completed and the workpiece 33 is taken out, it is possible to suppress the glass dust from rising outside the processing tank 32 by driving the dust exhaust device. Thereby, the surrounding environment can be kept clean.
(Second Embodiment)
FIG. 3 is a cross-sectional front view of an essential part of the spherical body processing apparatus according to the second embodiment. In FIG. 3, the hatching process is omitted. In the present embodiment, the configuration of the direction changing member 34 is different from that of the first embodiment. In addition, the same code | symbol is attached | subjected to the member which is the same as that of 1st Embodiment, or corresponds, and detailed description is abbreviate | omitted.

  In the present embodiment, the motor plate 50 is integrally attached to the upper part of the cylindrical side wall 30. In addition, a second motor 52 as a second driving means is fixed vertically downward in the approximate center of the motor plate 50. The output shaft 52 a of the second motor 52 is disposed substantially coaxially with the disk 28. One end of the arm 54 is fixed to the output shaft 52a, and the direction changing member 34 is fixed to the other end.

  When the second motor 52 is driven, the direction changing member 34 rotates along the inner surface of the cylindrical side wall 30 via the arm 54. In the present embodiment, the direction changing member 34 rotates in the direction opposite to the rotation direction of the disk 28. In FIG. 3, one direction changing member 34 is provided, but the number thereof is not limited.

Next, a method for processing the workpiece 33 will be described.
The second motor 52 is controlled to drive in conjunction with the first motor 38. When the second motor 52 is driven, the arm 54 rotates, and the direction changing member 34 rotates along the inner surface of the cylindrical side wall 30 in the direction opposite to the disk 28. As a result, the direction changing member 34 and the work 33 collide at various positions on the inner surface of the cylindrical side wall 30. Moreover, the number of collisions is greater than in the case of the first embodiment.

According to the present embodiment, the direction changing member 34 itself rotates in the opposite direction to the disk 28, so that the direction changing member 34 and the workpiece 33 collide at various positions on the inner surface of the cylindrical side wall 30. . Thereby, the moving direction of the workpiece 33 is forcibly changed, and the contact portion with the cylindrical side wall 30 is changed. Therefore, the wear of the abrasive grains can be made uniform, and the entire workpiece 33 can be uniformly processed into a sphere.
(Third embodiment)
FIG. 4 is a cross-sectional front view of an essential part of the sphere processing apparatus according to the third embodiment, and FIG. 5 is a plan view thereof. In the present embodiment, the configurations of the cylindrical side wall 30 and the direction changing member 34 are different from those of the first embodiment. In addition, the same code | symbol is attached | subjected to the member which is the same as that of 1st Embodiment, or corresponds, and detailed description is abbreviate | omitted.

  In the present embodiment, a cylindrical rotation base 56 is rotatably attached to the cylindrical base block 26 via a bearing 58. The cylindrical side wall 30 is integrally fixed to the rotation base 56. In addition, one drive roller 60 and two guide rollers 62 are disposed on the outer periphery of the rotation base 56 so as to be rotatable in contact with each other (see FIG. 5).

  A pressure sufficient for rotation is applied to the rotation base 56 from the drive roller 60. In order to receive this pressure, two guide rollers 62 are provided on the opposite side of the drive roller 60 across the shaft 22. The driving roller 60 is connected to an output shaft 64a of a third motor 64 as third driving means.

  Thus, when the third motor 64 is driven, the driving roller 60 is driven via the output shaft 64a. At the same time, the rotation base 56 that is in contact with the drive roller 60 is rotated by frictional force. Further, when the rotary base 56 rotates, the cylindrical side wall 30 integrated therewith rotates. In the present embodiment, the cylindrical side wall 30 rotates in the direction opposite to the rotation direction of the disk 28.

  On the other hand, a support shaft 66 is erected on the base plate 14 on the outer side of the base block 26. One end of a frame 68 is supported on the support shaft 66 so as to be swingable in the horizontal direction. A second motor 52 is fixed to the other end side of the frame 68. The output shaft 52 a of the second motor 52 is disposed substantially coaxially with the disk 28.

  The frame 68 is supported so as to be swingable in the arrow B-B ′ direction (horizontal direction) about the support shaft 66 (see FIG. 5). This is because the frame 68 becomes obstructive when the cylindrical side wall 30 or the disk 28 is replaced, so that the frame 68 can be retracted.

  As described in the second embodiment, one end of the arm 54 is fixed to the output shaft 52 a of the second motor 52, and the other end is fixed to the direction changing member 34. When the second motor 52 is driven, the direction changing member 34 rotates along the inner surface of the cylindrical side wall 30 via the arm 54. In this case, the direction changing member 34 rotates in the direction opposite to the rotation direction of the disk 28.

In FIG. 4, one direction changing member 34 is provided, but the number is not limited.
Next, a method for processing the workpiece 33 will be described.

  The second motor 52 and the third motor 64 operate in conjunction with the first motor 38. The arm 54 is rotated by driving the second motor 52, and the direction changing member 34 is further rotated in the same direction. In this case, the direction changing member 34 is rotationally controlled along the inner surface of the cylindrical side wall 30 in the direction opposite to the rotational direction of the disk 28.

  Further, when the third motor 64 is driven, the rotation base 56 rotates via the driving roller 60, and the cylindrical side wall 30 integrated therewith rotates. In this case, the cylindrical side wall 30 rotates in the direction opposite to the rotation direction of the disk 28. That is, in this embodiment, the cylindrical side wall 30 and the direction changing member 34 rotate in the direction opposite to the disk 28. Further, the rotational speeds of the cylindrical side wall 30 and the direction changing member 34 may be the same, or may be rotated at different speeds.

  According to this embodiment, by rotating the cylindrical side wall 30 in the direction opposite to the disk 28, the difference in relative speed between the cylindrical side wall 30 and the disk 28 increases. In this way, a larger momentum can be given to the workpiece 33 in contact with both the cylindrical side wall 30 and the disk 28, and the machining time of the workpiece 33 can be shortened.

  Further, the direction changing member 34 is also rotated in the opposite direction to the disk 28, so that the direction changing member 34 and the work 33 collide at various positions on the inner surface of the cylindrical side wall 30. For this reason, the moving direction of the workpiece | work 33 can be changed forcibly, and the contact site | part of the workpiece | work 33 and the cylindrical side wall 30 can be changed. Thus, the workpiece 33 can be processed into a uniform sphere while the diamond abrasive grains are uniformly worn.

It is a principal part cross-sectional front view of the spherical body processing apparatus of 1st Embodiment. It is a figure which shows the cross section which follows II-II same as the above. It is a principal part cross-sectional front view of the spherical body processing apparatus of 2nd Embodiment. It is a principal part cross-sectional front view of the spherical body processing apparatus of 3rd Embodiment. It is a top view same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sphere processing apparatus 12 Base 14 Base plate 16 Spindle cylinder 18 Spindle lid 20 Bearing 22 Shaft 24 Oil seal 26 Base block 26a Groove 28 Disc 30 Cylindrical side wall 31 Gap space 32 Work tank 33 Work 34 Direction change member (moving direction conversion means) )
36 pulley 38 first motor (first driving means)
38a Output shaft 40 Pulley 42 Timing belt 44 Exhaust flow path 46 Nozzle 48 Air release hole 50 Motor plate 52 Second motor (second drive means)
52a Output shaft 54 Arm 56 Rotating base 58 Bearing 60 Drive roller 62 Guide roller 64 Third motor (third drive means)
64a Output shaft 66 Support shaft 68 Frame

Claims (12)

In a sphere processing device that processes a workpiece made of a brittle material such as glass or ceramic into a sphere,
First driving means;
A disk that is rotationally driven by the first driving means and places the workpiece;
A cylindrical side wall disposed coaxially with the disk and forming a processing tank with the disk;
A moving direction changing means for forcibly changing the moving direction of the work by colliding the work put in the processing tank, and changing a contact portion between the work and the cylindrical side wall;
A gap space formed between the disk and the cylindrical side wall for discharging dust,
A spherical body processing apparatus comprising: abrasive particles attached to at least one of the disk and the cylindrical side wall to process the workpiece. The sphere processing apparatus according to claim 1, wherein the moving direction changing means is fixedly attached to the cylindrical side wall. The sphere processing apparatus according to claim 1, further comprising a second driving unit that rotationally drives the moving direction changing unit. The sphere processing apparatus according to claim 3, wherein the moving direction changing means is arranged to be rotatable in a direction opposite to a rotating direction of the disc. The sphere processing apparatus according to claim 1, wherein the moving direction changing unit includes an elastic body, a leaf spring, a synthetic resin, or a metal rod. The spherical body processing apparatus according to claim 1, wherein the cylindrical side wall is fixed to the disk. The spherical body processing apparatus according to claim 1, further comprising a third driving unit that rotationally drives the cylindrical side wall. The spherical body processing apparatus according to claim 7, wherein the cylindrical side wall rotates in a direction opposite to a rotation direction of the disk. The sphere processing apparatus according to claim 1, wherein the gap space communicates with an exhaust passage formed below between the disk and the cylindrical side wall. The sphere processing apparatus according to claim 1, wherein the gap space has a size smaller than a radius of a sphere obtained by processing the workpiece. The sphere processing apparatus according to claim 9, wherein the exhaust passage is connected to a dust exhaust device. The spherical body processing apparatus according to claim 9 or 11, wherein the exhaust flow path has an annular groove formed coaxially with the disk.