JP2009072890A - Polishing device and polishing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid the degradation of polishing performance while reducing the number of components. <P>SOLUTION: This polishing device comprises a polishing brush 15 to be positively and reversely rotated in an alternately repetitive manner, and an index table 10 having a holding table 12 (a holding part) for holding a plurality of workpieces and adapted to be intermittently rotated each time when the rotating direction of the polishing brush 15 is changed. The workpiece held by the index table 10 is polished at a first polishing position Pb in one direction by the polishing brush 15 being positively rotated, and the workpiece is moved to a second polishing position Pc with the intermittent rotation of the index table 10 as the rotating direction of the polishing brush 15 is changed. At the second polishing position Pc, the workpiece is polished in the reverse direction by the polishing brush 15 being reversely rotated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a deburring polishing apparatus and a polishing method.

Patent Document 1 discloses a polishing apparatus for deburring. In this polishing apparatus, a plurality of work tables are arranged on a rotary table so as to be able to rotate along a circumference concentric with the rotation center, and a polishing brush is arranged at a position corresponding to the work table.
The polishing brush has a configuration in which a large number of wires are bundled in parallel with the rotation center of the work table, and is rotated at high speed around an axis parallel to the rotation center of the work table. The polishing brush wears burrs on the workpiece surface by bringing the tip of the polishing brush into contact with the workpiece rotating on the work table.
Japanese Patent Laid-Open No. 4-8179

In the above-described conventional polishing apparatus, the polishing brush contacts the workpiece only from one of the clockwise direction and the counterclockwise direction. Therefore, sufficient deburring can be performed depending on the form of the burr. It may not be possible.
As means for improving the polishing performance, the one shown in FIG. 4 can be considered. This is because the first polishing brush 101 for forward rotation and the polishing brush 102 for reverse rotation are provided side by side, and a work (not shown) set on the work table 103 is first polished by the first polishing brush 101 and then rotated. The table 104 is intermittently rotated by a predetermined angle and polished by the second polishing brush 102. According to this polishing apparatus, since the work is rubbed from the forward and reverse directions by the first polishing brush 101 and the second polishing brush 102, deburring is surely performed.

However, since this polishing means requires two polishing brushes 101 and 102, there is a problem that the number of parts increases. In addition, since each polishing brush 101, 102 rotates only in one direction, either forward rotation or reverse rotation, the tip of the polishing brush 101, 102 is deformed so that it flows obliquely in one direction over a long period of use. This is unavoidable, and there is a risk that the polishing performance will deteriorate.
As a means for restoring the polishing function of the deformed polishing brushes 101 and 102, it is necessary to reverse the rotation direction of the polishing brushes 101 and 102 as appropriate. In this case, the rotation of the polishing brushes 101 and 102 is rotated. In addition, the control program for controlling the rotation of the work table 103 becomes complicated, which is not preferable.
The present invention has been completed based on the above circumstances, and an object thereof is to reduce the number of parts and avoid a decrease in polishing performance.

  As means for achieving the above object, the invention of claim 1 is a configuration in which a large number of polishing wires are bundled, and comprises a polishing brush that alternately repeats forward rotation and reverse rotation, and a plurality of workpieces. A first holding position for holding the workpiece and polishing the workpiece with the polishing brush; and a first polishing position, wherein the workpiece is rotated intermittently each time the rotation direction of the polishing brush is switched. And an index table that is intermittently revolved along a circumference passing through a second polishing position that is different from the position and that is polished by the polishing brush.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the outer diameter of the polishing brush is smaller than the outer diameter of the index table.

  The invention of claim 3 is a form in which a large number of polishing wires are bundled, and has a polishing brush that alternately repeats forward rotation and reverse rotation, and a holding portion that holds a plurality of workpieces, and the polishing brush Each time the rotation direction is switched, the workpiece is rotated at a first polishing position where the workpiece is polished by the polishing brush, and the polishing brush is at a position different from the first polishing position. And an index table that revolves intermittently along a circumference passing through a second polishing position to be polished at the first polishing position, the workpiece held on the index table at the first polishing position The first polishing position is obtained by polishing from one direction with the polishing brush rotating forward and intermittently rotating the index table as the rotation direction of the polishing brush is switched. Of the workpiece is moved to the second polishing position, in the second polishing position, having the features of the workpiece, where the polished from the opposite direction by the polishing brush to reverse rotation.

<Invention of Claim 1>
The work held on the index table is first polished from one direction by a polishing brush that rotates forward at the first polishing position, and then the index table is intermittently rotated in accordance with the switching of the rotation direction of the polishing brush, so that the second is performed. It moves to the polishing position and is polished from the reverse direction by the reversely rotating polishing brush. Since only one polishing brush is required, the number of parts is small. Further, since the polishing brush repeats forward rotation and reverse abduction alternately, the bristles of the polishing brush are not deformed so as to flow in one direction, and there is no possibility that the polishing performance is deteriorated.

<Invention of Claim 2>
Since the polishing brush simultaneously corresponds to both the first polishing position and the second polishing position, the outer diameter is large, but the outer diameter of the polishing brush is smaller than the outer diameter of the index table, The size of the polishing apparatus in the direction perpendicular to the direction in which the polishing brush and the index table are arranged does not have to be large.

<Invention of Claim 3>
Since only one polishing brush is required, the number of parts is small. Further, since the polishing brush repeats forward rotation and reverse abduction alternately, the bristles of the polishing brush are not deformed so as to flow in one direction, and there is no possibility that the polishing performance is deteriorated.

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. The polishing apparatus according to the present embodiment is for removing burrs generated when a disk-like workpiece (not shown) is subjected to pressing or the like by polishing, and has a circular shape for holding the workpiece. An index table 10 and a polishing brush 15 for polishing the work are provided.

  The index table 10 rotates intermittently by a fixed angle (90 °) in one direction (counterclockwise direction in the plan view shown in FIGS. 1 and 2) about the rotation shaft 11 whose axis is directed in the vertical direction. To get. As a means for intermittently rotating the index table 10 by 90 °, the rotation angle of the index table 10 is controlled based on an angle detection signal from a stepping motor or encoder that controls the rotation angle of the index table 10 based on the number of pulses. A well-known driving means (not shown) such as a servo motor can be used.

  The index table 10 is provided with four circular holding tables 12 (holding portions that are constituent elements of the present invention) arranged at equal angular intervals of 90 ° along a circumference concentric with the rotation shaft 11. It has been. On the upper surface of each holding table 12, a work having a disk shape substantially the same size as the holding table 12 is held so as to be able to rotate constantly while being placed concentrically. Each holding table 12 can be rotated in both forward and reverse directions around a vertical rotation shaft 13 parallel to the rotation shaft 11 of the index table 10. The rotation shafts 13 of the four holding tables 12 are arranged at equal angular intervals of 90 ° on one circumference concentric with the index table 10.

  The four holding tables 12 and the workpieces set on the holding table 12 include a loading position Pa, a first polishing position Pb where polishing by the polishing brush 15 is performed, and a first polishing position Pb in the process in which the index table 10 rotates intermittently. Each position Pa, Pb, Pc, Pd while revolving along the circumference passing through the four work positions of the second polishing position Pc and the discharge position Pd where the polishing by the polishing brush 15 is performed. Stops sequentially at predetermined time intervals.

  The holding table 12 is alternately driven in both forward and reverse directions when stopped at the first polishing position Pb, and is alternately driven in both forward and reverse directions when stopped at the second polishing position Pc. It has come to be. When the holding table 12 stopped at the first polishing position Pb is rotating in the forward direction (clockwise direction in FIGS. 1 and 2), the holding table 12 stopped at the second polishing position Pc is also forward. It has come to rotate. Further, when the holding table 12 stopped at the first polishing position Pb is rotating in the reverse direction (counterclockwise direction in FIGS. 1 and 2), the holding table 12 stopped at the second polishing position Pc. Also rotates in the opposite direction.

  As means for rotating the holding table 12 forward and backward at the first polishing position Pb, an endless belt is circulated in forward and reverse directions by a motor that can be driven in both forward and reverse directions, so that the holding table 12 is moved to the first polishing position Pb. A known belt drive mechanism (not shown) that makes the belt contact the outer periphery of the pulley of the rotation shaft 13 when the belt moves can be used. Further, as a means for rotating the holding table 12 forward and backward at the second polishing position Pc, a belt driving mechanism similar to that at the first polishing position Pb can be used. Since the holding table 12 at the first polishing position Pb and the holding table 12 at the second polishing position Pc are rotated in the same direction, the two holding tables 12 stopped at the different polishing positions are connected to one belt driving mechanism. You may make it rotate by.

  In a state where the holding table 12 is stopped at the loading position Pa, a work having a burr is set on the holding table 12. Further, when the holding table 12 is stopped at the discharge position Pd, the workpiece from which the burrs are removed is taken out from the holding table 12.

  The polishing brush 15 has a well-known configuration in which a number of polishing wires aligned in the vertical direction are bundled in a circular shape at the upper end portion, and has a cylindrical shape as a whole. The polishing brush 15 rotates at a high speed in both forward and reverse directions around the rotation shaft 11 of the index table 10 and the drive shaft 16 parallel to the rotation shaft 13 of the holding table 12 above the holding table 12. Yes. As a means for rotating the polishing brush 15 forward and backward, a well-known driving force transmission mechanism (not shown) that transmits the rotational force of a motor (not shown) using a gear mechanism or a belt mechanism can be used.

  The outer diameter of the polishing brush 15 is smaller than the outer diameter of the index table 10 and larger than the outer diameter of the holding table 12. The polishing brush 15 is stopped at a part of the workpiece stopped at the first polishing position Pb and at the second polishing position Pc with the drive shaft 16 positioned on the outer peripheral edge of the index table 10. It arrange | positions so that it can contact simultaneously with both part of workpiece | work. Here, the contact area with the polishing brush 15 in the workpiece stopped at each polishing position is a substantially convex lens-shaped area not including the rotation shaft 13. Hereinafter, this generally convex lens-shaped region of the workpiece is referred to as a polishing region 14 to be polished by the polishing brush 15.

Next, the operation of the present embodiment will be described with reference to FIG. 3 showing a time chart.
First, in the first first step Ta, the first work (hereinafter referred to as the first work) is set on the holding table 12 located at the loading position Pa. Thereafter, the index table 10 is intermittently rotated by 90 °, and the holding table 12 on which the workpiece is set is moved to the first polishing position Pb.

  Next, in the second step Tb, as shown in FIG. 1, the holding table 12 at the first polishing position Pb starts to rotate in the clockwise direction in FIG. 15 also starts to rotate clockwise (hereinafter also referred to as forward rotation). The bristles at the lower end of the polishing brush 15 rotating at high speed rub against the polishing area 14 of the workpiece, and wear away and remove the burrs protruding from the surface of the workpiece. At this time, the polishing brush 15 performs polishing while moving in the counterclockwise direction in FIG. 1 relative to the workpiece. Further, in the second step Tb in which the polishing is performed by the polishing brush 15 rotating forward at the first polishing position Pb, the next work (hereinafter referred to as the second work) is placed on the holding table 12 located at the loading position Pa. Set.

  When the polishing of the first workpiece for a predetermined time is completed at the first polishing position Pb, the forward rotation of the polishing brush 15 and the forward rotation of the holding table 12 at the first polishing position Pb are stopped, and then the index table 10 is intermittently rotated by 90 °. Rotate. During this time, the polishing brush 15 is retracted upward. As a result, the first workpiece moves to the second polishing position Pc, the second workpiece moves to the first polishing position Pb, and the third step Tc is started.

  In the third step Tc, as shown in FIG. 2, the holding table 12 at the first polishing position Pb and the holding table 12 at the second polishing position Pc are rotated counterclockwise in FIG. 2 (hereinafter referred to as reverse rotation). ) And the polishing brush 15 also starts to rotate counterclockwise in FIG. 2 (hereinafter also referred to as reverse rotation). Thereby, the polishing brush 15 performs the polishing while moving in the clockwise direction in FIG. 2 relative to the polishing region 14 of the first workpiece at the second polishing position Pc, and at the same time, the first brush at the first polishing position Pb. Polishing is performed while moving in the clockwise direction in FIG. When this third step Tc is completed, deburring (polishing) for the first workpiece is completed. In the third step Tc, the next workpiece (hereinafter referred to as the third workpiece) is further set on the holding table 12 located at the loading position Pa.

  When the third step Tc is completed, the reverse rotation of the polishing brush 15, the reverse rotation of the holding table 12 at the first polishing position Pb, and the reverse rotation of the holding table 12 at the second polishing position Pc are stopped. It rotates 90 ° intermittently. During this time, the polishing brush 15 is retracted upward. As a result, the first work moves to the discharge position Pd, the second work moves to the second polishing position Pc, the third work moves to the first polishing position Pb, and the fourth step Td is started.

  In the fourth step Td, as shown in FIG. 1, the holding table 12 at the first polishing position Pb and the holding table 12 at the second polishing position Pc start normal rotation, and the polishing brush 15 also starts normal rotation. . As a result, the polishing brush 15 performs polishing while moving in the counterclockwise direction in FIG. 1 relative to the second workpiece at the second polishing position Pc, and simultaneously with the third workpiece at the first polishing position Pb. On the other hand, polishing is performed while relatively moving in the counterclockwise direction in FIG. When this fourth step Td is completed, deburring (polishing) for the second workpiece is completed. In the fourth step Td, the first work is taken out from the holding table 12 at the discharge position Pd, and the next work (hereinafter referred to as the fourth work) is set on the holding table 12 located at the loading position Pa. Is done.

  When the fourth step Td is completed, the forward rotation of the polishing brush 15, the forward rotation of the holding table 12 at the first polishing position Pb, and the forward rotation of the holding table 12 at the second polishing position Pc are stopped. It rotates 90 ° intermittently. During this time, the polishing brush 15 is retracted upward. As a result, the second workpiece moves to the discharge position Pd, the third workpiece moves to the second polishing position Pc, the fourth workpiece moves to the first polishing position Pb, and the fifth step Te is started.

  In the fifth step Te, as shown in FIG. 2, the holding table 12 at the first polishing position Pb and the holding table 12 at the second polishing position Pc start reverse rotation, and the polishing brush 15 also starts reverse rotation. Thereby, the polishing brush 15 performs the polishing while moving in the clockwise direction in FIG. 2 relative to the third workpiece at the second polishing position Pc, and at the same time, with respect to the fourth workpiece at the first polishing position Pb. However, polishing is performed while relatively moving in the clockwise direction in FIG. When the fifth step Te is completed, the deburring (polishing) for the third workpiece is completed. In the fifth step Te, the second workpiece is taken out from the holding table 12 at the discharge position Pd, and the next workpiece (hereinafter referred to as the fifth workpiece) is set on the holding table 12 positioned at the loading position Pa. Is done.

  Thereafter, each time the index table 10 rotates intermittently as described above, the polishing brush 15 and the holding table 12 alternately repeat forward rotation and reverse rotation. The workpiece set at 12 is polished sequentially. During this time, the polishing brush 15 sequentially performs polishing that rubs in a counterclockwise direction relative to one workpiece and polishing that rubs in a relatively clockwise direction, so that the workpiece is rubbed in both forward and reverse directions. As a result, good polishing is performed.

  As described above, in the present embodiment, since there is only one polishing brush 15 used as means for performing polishing such that the workpiece is rubbed in two directions, the reverse of the polishing brush dedicated to the forward direction. Compared to the one using the two polishing brushes 15 with the direction-specific polishing brush, the number of parts is reduced.

  Further, when the polishing brush rotates in only one direction, there is a risk that the polishing tip will be deformed so that the bristles of the polishing brush flow obliquely in one direction due to long-term use. In this respect, in this embodiment, after the polishing brush 15 finishes polishing one workpiece, the rotation direction of the polishing brush 15 is reversed forward and backward to polish the next workpiece. There is no possibility that the brush tip of the brush 15 is deformed so as to flow obliquely in one direction, and good polishing performance is maintained for a long time.

  Further, since the polishing brush 15 simultaneously polishes both the work at the first polishing position Pb and the work at the second polishing position Pc, it is necessary to increase the outer diameter. The diameter is suppressed to be smaller than the outer diameter of the index table 10. As a result, the overall size of the polishing apparatus in the direction perpendicular to the direction in which the polishing brush 15 and the index table 10 are aligned (the horizontal direction in FIGS. 1 and 2) does not have to be large.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the holding part is rotated. However, according to the present invention, when the burr generation position in the workpiece is limited, the holding part may not rotate.
(2) In the above embodiment, the number of holding units is four, but according to the present invention, the number of work tables may be two, three, five, or more.
(3) Although the outer diameter of the polishing brush is smaller than the outer diameter of the index table in the above embodiment, according to the present invention, the outer diameter of the polishing brush is the same as the outer diameter of the index table. It is good also as a bigger dimension.

FIG. 3 is a plan view showing a state in which polishing is performed by rotating the polishing brush forward in the polishing apparatus according to the first embodiment. A plan view showing the state where the polishing brush is rotated in the reverse direction for polishing. Time chart showing the polishing process Plan view of conventional polishing equipment

Explanation of symbols

10 ... Index table 12 ... Holding table (holding unit)
15 ... polishing brush Pb ... first polishing position Pc ... second polishing position

Claims (3)

A polishing brush in which a large number of polishing wires are bundled, and alternately repeats forward rotation and reverse rotation;
A holding portion that holds a plurality of workpieces, and is configured to rotate intermittently every time the rotation direction of the polishing brush is switched; and the first polishing position where the workpiece is polished by the polishing brush; Polishing, comprising: an index table that revolves intermittently along a circumference that is different from the first polishing position and passes through a second polishing position polished by the polishing brush. apparatus.   The polishing apparatus according to claim 1, wherein an outer diameter of the polishing brush is smaller than an outer diameter of the index table. A polishing brush in which a large number of polishing wires are bundled, and alternately repeats forward rotation and reverse rotation;
A holding portion that holds a plurality of workpieces, and is configured to rotate intermittently every time the rotation direction of the polishing brush is switched; and the first polishing position where the workpiece is polished by the polishing brush; With a structure including an index table that intermittently revolves along a circumference passing through a second polishing position that is different from the first polishing position and is polished by the polishing brush,
The workpiece held on the index table is polished from one direction by the polishing brush that rotates forward at the first polishing position,
By intermittently rotating the index table as the rotation direction of the polishing brush is switched, the workpiece at the first polishing position is moved to the second polishing position,
A polishing method, characterized in that, at the second polishing position, the workpiece is polished in the reverse direction by the polishing brush rotating in the reverse direction.

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