JP2008055535A - Machining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To machine a workpiece into a spherical shape with high degree of accuracy in a machining device. <P>SOLUTION: This machining device 1 is provided with an upper disc 3 and a lower disc 4 respectively having circular grooves 3b, 4b opposed to each other for sandwiching the workpiece (5), and a rotation driving means 7 rotating at least one (lower disc 4) of these upper disc 3 and lower disc 4. It is further provided with a positioning member (6) positioning the upper disc 3 and the lower disc 4 in a horizontal direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a processing apparatus including an upper disk and a lower disk on which at least one of circular grooves facing each other is rotated.

Conventionally, for example, in order to obtain a glass lens, a technique of forming a glass ball as a preform with a molding apparatus has been employed.
As a method of processing a glass ball into a desired spherical shape to be charged into the molding apparatus, a glass block-shaped material is charged into a cylindrical barrel processing machine together with a polishing member, and these are rotated to rotate a rough processed piece. , And this rough processed piece is finish-polished.

On the other hand, in Patent Document 1, a workpiece is sandwiched between an upper disk and a lower disk in which circular grooves facing each other are formed, and one of the disks is rotated, thereby rotating the workpiece into a spherical shape. Describes the processing method.
JP 2000-318814 A

  By the way, in the above-described method of rotating a glass block-shaped material together with the polishing member, it is difficult to obtain a glass ball in a highly accurate spherical shape because the material is rotated together with the polishing member. Further, since finishing polishing is required as a separate operation, it is time consuming.

  And since the processing method of the said patent document 1 does not throw in an abrasive | polishing member, it is easy to obtain a spherical glass ball with higher precision than said method. However, since the upper disk and the lower disk are not aligned in the horizontal direction, there is a problem that the workpiece cannot be processed into a high-precision spherical shape due to slight discrepancies between the disks in the horizontal direction. .

  The subject of this invention is providing the processing apparatus which processes a to-be-processed object into a highly accurate spherical shape in view of the said conventional situation.

  In order to solve the above-described problems, a processing apparatus according to the present invention includes an upper disk and a lower disk each having circular grooves facing each other to sandwich a workpiece, and at least one of the upper disk and the lower disk. A processing apparatus including a rotation driving unit that rotates a disk includes a positioning member that positions the upper disk and the lower disk in a horizontal direction.

  The positioning member is provided so as to protrude from the center of the machining surface of one of the upper disk and the lower disk, and is inserted into an insertion hole formed at the center of the machining surface of the other disk for positioning. It is good to have a configuration to

In addition, at least one of the upper disk and the lower disk may be configured to be movable in the horizontal direction so as to allow horizontal positioning by the positioning unit.
Moreover, it is good to further comprise the raising / lowering drive means which moves the said upper disk up and down, and it is good for the said upper disk to be the structure connected to the said raising / lowering drive means via an elastic member at least.

  In the present invention, the horizontal displacement between the upper disk (groove formed in the upper disk) and the lower disk (groove formed in the lower disk) is determined by the positioning member that positions the upper disk and the lower disk in the horizontal direction. It is possible to suppress the deterioration of the shape accuracy (sphericity) of the workpiece caused by the above. Therefore, according to the present invention, the workpiece can be processed into a highly accurate spherical shape.

Hereinafter, a processing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a main part showing a processing apparatus according to an embodiment of the present invention. 2A is a cross-sectional view showing an upper disk and a lower disk of the processing apparatus, and FIG. 2B is a plan view showing a processing surface of the lower disk.

In FIG. 1, the processing apparatus 1 includes a housing 2 illustrated by a two-dot chain line, an upper disk 3, a lower disk 4, and the like disposed in the housing 2.
As shown in FIGS. 2A and 2B, the upper disk 3 and the lower disk 4 have annular grooves 3b and 4b facing each other on their processed surfaces 3a and 4a. Between these grooves 3b and 4b, glass balls 5 and 5 are processed as workpieces. The diameter of the grooves 3b and 4b is larger than the diameter of the glass ball 5. Moreover, although the spherical glass ball | bowl 5 is shown in the figure, the glass raw material thrown into the groove | channels 3b and 4b before a process does not need to be exhibiting a spherical shape completely. However, when the glass material to be introduced has a shape far from the spherical shape, it is desirable to soften the glass material in consideration of ease of processing.

  An eccentric adjustment pin 6 as a positioning member is fitted into the upper disk 3 from above so as to protrude from the processing surface 3a. The tip 6a of the eccentricity adjustment pin 6 is formed in a taper shape. In addition, a flange portion 6 b is formed on the eccentric adjustment pin 6.

  The eccentric adjustment pin 6 is guided by the tip 6a formed in a tapered shape at the time of machining shown in the drawing, that is, when the upper disk 3 and the lower disk 4 are approached, and is formed on the machining surface 4a of the lower disk 4. The upper disk 3 and the lower disk 4 are positioned in the horizontal direction by being inserted into the through holes 4c as insertion holes.

  Mounted on the housing 2 is a motor 7 as a rotation driving means for rotating the lower disk 4 in the rotation direction a shown in FIG. The driving force of the motor 7 is transmitted to the lower disk 4 through the coupling 8 and the rotating shaft 9. The rotating shaft 9 is supported by the housing 2 via radial bearings 10 and 10 so as to prevent the eccentricity of the central axis and hence the central axis of the lower disk 4.

  On the other hand, the upper disk 3 is connected to a pressure shaft 16 and a cylinder 17 as lifting drive means via an upper disk base portion 11, a lower plate 12, support shafts 13, 13, an upper plate 14, a connecting member 15 and the like. The pressure shaft 16 and the cylinder 17 are moved up and down by the driving force.

  An upper disk base portion 11 is disposed above the upper disk 3, and a lower plate 12 is disposed above the upper disk 3, and two support shafts 13 and 13 are erected on the lower plate 12. And on the upper part of these two support shafts 13, 13, convex portions 13 a, 13 a fitted inside the lower plate of the thrust bearings 18, 18 interposed between the upper plate 14, and these convex portions 13 a , 13a and extending portions 13b, 13b extending upward.

  The extending portions 13 b and 13 b pass through through holes 14 a and 14 a formed in the upper plate 14, and are screwed into presser plates 19 and 19 positioned above the upper plate 14. As will be described in detail later, the diameters of the through holes 14a and 14a are larger than the diameters of the extending portions 13b and 13b in order to allow positioning of the upper disk 3 and the lower disk 4 in the horizontal direction by the eccentricity adjusting pin 6. Largely formed.

  The disc springs 20 and 20 are interposed between the press plates 19 and 19 and the upper plate 14. The press plates 19 and 19, the support shafts 13 and 13, the thrust bearings 18 and 18, the upper disk 3, etc. It is movable in the horizontal direction by the gap between the through holes 14a, 14a and the extending portions 13b, 13b. On the other hand, since the upper plate 14 is fixed to the cylinder 17 and the pressure shaft 16 connected to the housing 2 via the connecting member 15, it does not move in the horizontal direction.

  In the present embodiment described above, the upper disk 3 (the groove 3b formed in the upper disk 3) and the lower disk are adjusted by the eccentricity adjusting pin 6 as a positioning member for positioning the upper disk 3 and the lower disk 4 in the horizontal direction. It is possible to suppress the deterioration of the shape accuracy of the glass ball 5 due to the horizontal deviation from the disk 4 (the groove 4b formed in the lower disk 4). Therefore, according to the present embodiment, the glass ball 5 (workpiece) can be processed into a highly accurate spherical shape.

  In the present embodiment, an eccentricity adjustment pin 6 (positioning member) is provided so as to protrude from the center of the processing surface 3 a of the upper disk 3, and the eccentricity adjustment pin 6 is provided at the center of the processing surface 4 a of the lower disk 4. The upper disk 3 and the lower disk 4 are positioned in the horizontal direction by being inserted into the formed through hole 4c. Therefore, the space of the circular grooves 3b and 4b formed in the disks 3 and 4 can be effectively ensured. Furthermore, there is no need to form the through-hole 4c in an annular shape when the eccentricity adjusting pin 6 is provided in a portion other than the center of the processed surface 3a, and the eccentricity adjusting pin 6 is provided on the outer peripheral surface of the disks 3 and 4. The positioning accuracy caused by the large contact area of the disc with the eccentricity adjusting pin 6 that occurs when the disc is provided is not deteriorated. Therefore, the glass ball 5 can be processed into a more accurate spherical shape.

  Further, there is a gap between the extending portions 13b and 13b of the support shafts 13 and 13 and the through holes 14a and 14a of the upper plate 14 in order to allow horizontal positioning of the upper disc 3 and the lower disc 4 by the eccentric adjustment pin 6. Since the upper disk 3 can be moved in the horizontal direction, the eccentric adjustment pin 6 can be effectively positioned, and the glass ball 5 can be processed into a more accurate spherical shape.

  Furthermore, since the tip 6a of the eccentricity adjusting pin 6 is formed in a taper shape, positioning by the eccentricity adjusting pin 6 is made more effective, and the glass ball 5 can be processed into a more accurate spherical shape.

  In the present embodiment, more specifically, the upper disk 3 side member (upper disk 3) is connected so that the upper disk 3 is connected to the pressure shaft 16 and the cylinder 17 as lifting drive means through at least an elastic member. The load on the disk 3, the upper disk base 11, the lower plate 12, the support shaft 13, and the presser plate 19) is a member on the lifting drive means side (cylinder 17, pressure shaft 16, connecting member 15, and upper plate) with the elastic member interposed therebetween. 14), a disc spring 20 as an elastic member is interposed between the upper plate 14 and the presser plate 19. Therefore, the weight of the member on the upper disk 3 side can be canceled, and the fine pressure load necessary for the initial stage of the machining process can be easily set. Thus, the glass ball 5 can be processed into a more accurate spherical shape.

  In the present embodiment, since the eccentricity adjustment pin 6 is disposed at the center of the machining surface 3a of the upper disk 3, as described above, the eccentricity adjustment pin 6 is a portion of the machining surface 3a excluding the center or the disk 3, However, it is possible to position the upper disk 3 and the lower disk 4 in the horizontal direction even if they are arranged at these positions. The arrangement position of the eccentricity adjustment pin 6 is not limited to the center of the processing surface 3.

  In the present embodiment, the tip 6a of the eccentricity adjusting pin 6 is tapered, but the angle between the insertion hole (through hole 4c) of the lower disk 4 and the machining surface 4a is formed into an inclined surface (chamfering). By doing so, positioning can be performed effectively.

  In this embodiment, the eccentric adjustment pin 6 is provided in the upper disk 3 and the insertion hole (through hole 4c) is provided in the lower disk 4. However, the eccentric adjustment pin 6 is provided in the lower disk 4 and the insertion hole is provided in the upper disk. Even in the configuration provided in FIG. 3, it is possible to obtain the effects of the present embodiment. Similarly, the effect of the present embodiment can be obtained even when the rotating disk is the upper disk 3 instead of the lower disk 4.

  Further, in the present embodiment, the workpiece is described as a glass material, but even if it is another brittle material or the like, as long as it is a material that can be processed between disks that rotate at least one of the materials, the present embodiment The effect of form can be obtained.

FIG. 3 is a cross-sectional view of an essential part showing a processing apparatus according to another embodiment of the present invention. Note that in this embodiment, points that are the same as those in the above embodiment will be described without description.
In the figure, the processing device 21 includes a housing 22 illustrated by a two-dot chain line, an upper disk 23, a lower disk 24, and the like disposed in the housing 22.

  The upper disk 23 and the lower disk 24 have annular grooves 23b and 24b facing each other on their processed surfaces 23a and 24a. Between these grooves 23b and 24b, glass balls 25 and 25 as workpieces are processed.

  An eccentric adjustment pin 26 as a positioning member is fitted into the upper disk 23 from above so as to protrude from the processing surface 23a. The tip 26a of the eccentricity adjustment pin 26 is formed in a taper shape. A flange portion 26 b is formed on the eccentric adjustment pin 26.

  The eccentricity adjusting pin 26 is guided by a tapered tip 26a and formed on the machining surface 24a of the lower disk 24 at the time of machining shown in the drawing, that is, when the upper disk 23 and the lower disk 24 approach each other. The upper disk 23 and the lower disk 24 are positioned in the horizontal direction by being inserted into the through holes 24c as insertion holes.

  Mounted on the housing 22 is a motor 27 as rotational drive means for rotating the lower disk 24 in the rotational direction a shown in FIG. The driving force of the motor 27 is transmitted to the lower disk 24 via the coupling 28 and the rotating shaft 29. The rotating shaft 29 is supported by the housing 22 via radial bearings 30 and 30 in order to prevent the eccentricity of the central axis and hence the central axis of the lower disk 24.

  On the other hand, the upper disk 23 is connected to an elevating actuator 37 as an elevating drive means via an upper disk base portion 31, a lower plate 32, a connecting member 33, a spring 35 as an elastic member, an elevating shaft 36, and the like. The actuator 37 is moved up and down by the driving force of the actuator 37.

  An upper disk base 31 is disposed above the upper disk 23, and a connecting member 33 is disposed further above. A housing 34 is disposed on the connecting member 33, and a spring 35 is interposed between a lid 34 a of the housing 34 and a flange portion 36 a formed at the lower end of the elevating shaft 36. The upper disk 23 moves up and down by the driving force of the lifting / lowering actuator 37 with such a configuration.

  Two support shafts 38, 38 are erected on the lower plate 32. The support shafts 38 and 38 are passed through a guide plate 39 supported by the housing 22 through holding portions 39a and 39a of the guide plate 39, and are connected to the upper plate 40 at the upper end.

  Here, above the upper plate 40, an actuator base 42 on which the lifting actuator 37 and the two pressurizing actuators 41 and 41 are mounted is disposed while being supported by the guide plate 39. The lifting shaft 36 connected to the lifting actuator 37 and the pressing shafts 43, 43 connected to the pressing actuators 41, 41 penetrate the actuator base 42. The pressurizing shafts 43, 43 pressurize the upper plate 40, whereby the upper disk 23 is pressed via the support shafts 38, 38, the lower plate 32, and the upper disk base portion 31, and the glass ball 25 The desired pressure is applied to the. The guide plate 39 is formed with a through-hole 39b that is sized to allow the housing 34 to pass therethrough, so that a moving width in which the housing 34 moves up and down, that is, a moving width in which the upper disk 23 moves up and down is secured. Yes.

  According to the present embodiment described above, similar to the above embodiment, the upper disk 23 (upper disk 23) is provided by the eccentric adjustment pin 26 as a positioning member for positioning the upper disk 23 and the lower disk 24 in the horizontal direction. 23 and the lower disk 24 (the groove 24b formed in the lower disk 24) can be prevented from deteriorating the shape accuracy of the glass ball 25 due to the horizontal displacement. Therefore, according to the present embodiment, the glass ball 25 (workpiece) can be processed into a highly accurate spherical shape.

  Further, in the present embodiment, specifically, the upper disk 23 side member (upper disk 23, upper disk 23, etc.) is connected so that the upper disk 23 is connected to an elevating actuator 37 as an elevating drive means through at least an elastic member. The weights of the upper disk base 31, the lower plate 32, the connecting member 33, the housing 34, the support shaft 38 and the upper plate 40) are applied to the members on the lifting drive means (the lifting shaft 36 and the lifting actuator 37) with the elastic member interposed therebetween. In addition, a spring 35 as an elastic member is interposed between the lid 34 a of the housing 34 and the flange portion 36 a of the elevating shaft 36. Therefore, the weight of the member on the upper disk 23 side can be canceled, and the fine pressure load necessary for the initial stage of the machining process can be easily set. Thus, the glass ball 25 can be processed into a more accurate spherical shape.

  In addition, for example, the upper disk 23 can be moved in the horizontal direction by configuring the holding portions 39a and 39a of the guide plate 39 from an elastic member, so that the upper disk 23 and the lower disk 24 by the eccentricity adjusting pin 26 can be moved. Positioning in the horizontal direction is effectively performed, and the glass ball 25 can be processed into a more accurate spherical shape.

It is principal part sectional drawing which shows the processing apparatus which concerns on one embodiment of this invention. It is sectional drawing which shows the upper disk and lower disk of the said processing apparatus. It is a top view which shows the processing surface of the said lower disk. It is principal part sectional drawing which shows the processing apparatus which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Processing apparatus 2 Housing | casing 3 Upper disk 3a Processing surface 3b Groove 4 Lower disk 4a Processing surface 4b Groove 4c Through-hole 5 Glass ball 6 Eccentricity adjustment pin 6a Tapered tip 6b Flange part 7 Motor 8 Coupling 9 Rotating shaft 10 Radial bearing DESCRIPTION OF SYMBOLS 11 Upper disk base part 12 Lower board 13 Support shaft 13a Convex part 13b Extension part 14 Upper board 14a Through-hole 15 Connecting member 16 Pressurizing shaft 17 Cylinder 18 Thrust bearing 19 Pressing plate 20 Belleville spring 21 Processing apparatus 22 Case 23 Top Disk 23a Machining surface 23b Groove 24 Lower disk 24a Machining surface 24b Groove 24c Through hole 25 Glass ball 26 Eccentric adjustment pin 26a Tapered tip 26b Flange portion 27 Motor 28 Coupling 29 Rotating shaft 30 Radial bearing 31 Upper disc base portion 32 Lower plate 33 Connecting member 34 c Managing 34a lid 35 springs 36 lifting shaft 36a flange portion 37 lifting actuator 38 support shaft 39 the guide plate 39a holding portion 39b through hole 40 upper plate 41 pressurizing actuator 42 The actuator base 43 pressing axis

Claims (4)

In a processing apparatus comprising an upper disc and a lower disc each having circular grooves facing each other for sandwiching a workpiece, and a rotation driving means for rotating at least one of the upper disc and the lower disc,
A processing apparatus comprising a positioning member for positioning the upper disk and the lower disk in a horizontal direction.   The positioning member is provided so as to protrude from the center of the machining surface of one of the upper disk and the lower disk, and is inserted into an insertion hole formed at the center of the machining surface of the other disk for positioning. The processing apparatus according to claim 1.   The at least one of the upper disk and the lower disk is movable in the horizontal direction to allow horizontal positioning by the positioning unit. Processing equipment. Further comprising an elevating drive means for moving the upper disk up and down;
The processing apparatus according to any one of claims 1 to 3, wherein the upper disk is connected to the lift driving means via at least an elastic member.