JP5402295B2 - Sphere polishing equipment - Google Patents

Description

  The present invention relates to a sphere polishing apparatus, and more particularly to a sphere polishing apparatus characterized by a sphere supply method.

  A sphere used for the ball bearing is polished by, for example, a sphere polishing apparatus disclosed in Patent Document 1. As shown in FIGS. 7A to 7C, the spherical polishing apparatus includes a stationary platen 101 having a fixed polishing surface 110 and a rotating plate 102 having a rotating polishing surface 120. The fixed polishing surface 110 has a semicircular cross section and a plurality of substantially circular fixed grooves 111 arranged concentrically as a whole, while the rotating polishing surface 120 has a plurality of rotating grooves 121 of the same type as the fixed grooves 111. Are arranged so as to face the fixing grooves 111, respectively. Since the plurality of fixed grooves 111 and the plurality of rotating grooves 121 face each other, a plurality of polishing grooves are formed by both of them. Since the fixed platen 101 is provided with a notch, a part of the fixed groove 111 is also cut off. Therefore, a part of the polishing groove is also opened, and the inlets I1 to I7 for introducing the sphere are provided at one end of the open part, and the outlets O1 to O7 for discharging the sphere are provided at the other end. Yes.

  When a sphere is inserted from the inlets I1 to I7 while the turntable 102 is rotated, the sphere is held in the polishing groove, and the inner wall surface of the polishing groove, that is, the inside of the fixed groove 111 and the rotation groove 121, The sphere is polished by the friction between the wall surface and the sphere. As the turntable 102 rotates, the sphere moves to the discharge ports O1 to O7 while being polished, and is eventually discharged from the discharge ports O1 to O7.

  By the way, this sphere polishing apparatus further includes a sphere supply device 103 that supplies the spheres discharged from the discharge ports O1 to O7 to the input ports I1 to I7 again. Referring to FIG. 8 as well, this supply device is provided with a rotating conveyor 131 at the bottom of a substantially bottomed short cylinder, and is supplied from a discharge chute 104 extending from discharge ports O1 to O7. By moving the spheres by the conveyor 131, the spheres are again supplied to the input ports I1 to I7 via the input chute 105 extended from the input ports I1 to I7. Since the sphere polishing apparatus includes the sphere supply device 103, the sphere can be continuously polished as many times as necessary.

  By the way, according to this sphere supply device, the spheres discharged from the discharge ports O1 to O7 are supplied to the input ports I1 to I7 while being mixed with each other on the conveyor 131. Occurs. According to Patent Document 1, as shown in FIG. 9, a concave portion 141 is provided in a part of a chute (corresponding to the input chute 105), and a sphere is pooled there to flow into the groove of the grooved chute. Yes, because the spheres that have flowed from the conveyor by the concave portion 141 are braked and the spheres that have flowed a lot are moved to the smaller side and averaged over the entire width of the chute, so that they are uniformly arranged in one row. It is described that the variation in the number of passes through each sphere board is reduced, and the difference between lots can be reduced.

JP 2000-318814 A

  However, even if “averaged over the entire width of the chute and evenly arranged in a line”, the spheres with different number of throws will already be mixed on the conveyor. The effect of “small variation in the number of times to perform” is insufficient.

  The present invention has been made in view of such a state, and it is an object of the present invention to provide a sphere polishing apparatus that can suppress polishing variation between spheres as compared with the above-described conventional one.

  [1] An independent form of the present spherical polishing apparatus has the following matters. The spherical polishing apparatus has a fixed platen, a rotating plate, a plurality of input ports, a plurality of discharge ports, a plurality of communication passages, and a simultaneous input device, and the fixed platen has a fixed polishing surface and a plurality of fixed grooves. The fixed groove is formed on the fixed polishing surface, the cross-sectional shape is semicircular, the shape on the fixed polishing surface is substantially circular, the plurality of fixed grooves are formed concentrically, The rotating disk has a rotating polishing surface and a plurality of rotating grooves, and rotates with respect to the fixed disk. The rotating groove is formed on the rotating polishing surface and has a semicircular cross-sectional shape. The shape on the surface is substantially circular, the plurality of rotating grooves are formed concentrically, and when the fixed polishing surface and the rotating polishing surface are opposed to each other, That of the fixed groove and the rotating groove facing each other Thus, a plurality of polishing grooves are formed, each of the plurality of inlets inputs a sphere into a corresponding one of the plurality of polishing grooves, and each of the plurality of outlets includes the plurality of polishing grooves. The spherical body is discharged from a corresponding one of the polishing grooves, and the plurality of communication passages are provided with the discharge port for discharging the spherical body from one of the two adjacent polishing grooves, and the two adjacent grooves. The discharge port for discharging the sphere from one of the outermost polishing groove and the innermost polishing groove among the plurality of polishing grooves, and connecting the inlet for inserting the sphere into the other of the polishing grooves. And the insertion port through which the sphere is inserted into the other of the outermost polishing groove and the innermost polishing groove among the plurality of polishing grooves. The sphere discharged from the polishing groove The next polishing groove is inserted in the order in which it is ejected, and all of the plurality of polishing grooves are passed in order. The simultaneous charging device has a roller and a roller control device, and the spheres are simultaneously inserted into the multiple charging ports. The roller is formed of a soft material, and the outer peripheral portion of the roller is rotated in contact with the sphere to rotate the sphere, and the roller control device rotates the roller. By controlling the number, the number of the spheres held in the plurality of polishing grooves is controlled.
  [2] An embodiment subordinate to the spherical polishing apparatus has the following matters. Each of the plurality of communication passages has a conveyance pipe at least in part, and the inside of the conveyance pipe is filled with oil.
  [3] An embodiment subordinate to the spherical polishing apparatus has the following matters. The sphere polishing device has a polishing dust peeling device, and the polishing dust peeling device peels polishing dust attached to the sphere from the sphere.
  [4] An embodiment subordinate to the spherical polishing apparatus has the following matters. The communication passage has a fluorine coating at the contact portion with the sphere.

  According to the spherical polishing apparatus of [1], the following effects can be obtained.
  (A) A sphere discharged from one polishing groove is not repeatedly put into the same polishing groove.
  (B) The number of times each sphere is polished by each polishing groove is substantially the same. For this reason, even when there is variation in the polishing characteristics of each polishing groove, the polishing state of the spheres is easily averaged.
  (C) It is possible to control the number of times that the sphere is put into the polishing groove, that is, the number of times polishing is polished by the polishing groove. For this reason, it becomes possible to make the dispersion | variation in the grinding | polishing state of a spherical body smaller.
  (D) The pressure applied to the sphere when the sphere is put into the polishing groove is reduced. For this reason, it is suppressed that a wrinkle arises in a sphere due to the pressure concerning a sphere.
  (E) When a fixed pressure is applied to the fixed platen and the rotating platen, the pressure applied to one sphere becomes constant when the sphere is polished. For this reason, all the spheres to be polished are subjected to the same pressure. For this reason, the dispersion | variation in the grinding | polishing state of a sphere becomes smaller.

  According to the spherical polishing apparatus of [3], the following effects can be obtained.
  Since the polishing debris is removed before the sphere is put into the polishing groove, the sphere is prevented from being damaged by polishing.

  According to the spherical polishing apparatus of [4], the following effects can be obtained.
  Since the frictional resistance when the sphere is transported from the outlet to the inlet is small, the sphere is transported smoothly. In addition, the sphere is less likely to be damaged in the communication passage.

  According to the present invention, it is possible to provide a sphere polishing apparatus that can suppress polishing variation between spheres in a single layer as compared with the above-described conventional one.

The perspective view of the spherical body polisher of an embodiment. The perspective view of the simultaneous injection | throwing-in apparatus of embodiment. Sectional drawing of the AA line of FIG. Sectional drawing of the chute | shoot of a modification. It is a test result of Example 1, and shows a mutual difference and a diameter difference. It is a test result of the comparative example 1, Comprising: A graph which shows a mutual difference and diameter disparity. (A) The perspective view of the conventional spherical polishing apparatus. (B) Plane showing the fixed polishing surface of the fixed platen Figure. (C) The top view which shows the rotation grinding | polishing surface of a turntable. The top view of the conventional spherical body polisher. The perspective view of the conventional throwing chute.

An embodiment of a spherical polishing apparatus embodying the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the spherical polishing apparatus includes a stationary platen 1 having a fixed polishing surface 10 and a rotating plate 2 having a rotating polishing surface 20. The fixed polishing surface 10 has a semicircular cross section and a plurality of substantially circular fixed grooves 11 arranged concentrically as a whole, while the rotating polishing surface 20 has a plurality of rotating grooves of the same type as the fixed grooves 11. The fixing grooves 11 are arranged to face each other. Since the plurality of fixed grooves 11 and the plurality of rotating grooves face each other, a plurality of polishing grooves are formed by both of them. Since the fixed platen 1 is provided with a notch, the fixed groove 11 is also partially cut off. Therefore, a part of the polishing groove is also opened, and the inlets I1 to I7 for introducing the sphere are provided at one end of the open part, and the outlets O1 to O7 for discharging the sphere are provided at the other end. Yes.

  When the sphere is introduced from the inlets I1 to I7 while the turntable 2 is rotated, the sphere is held in the polishing groove, and the inner wall surface of the polishing groove, that is, the fixed groove 11 and the inner wall surface of the rotation groove. The sphere is polished by friction between the sphere and the sphere. As the turntable 2 rotates, the sphere moves to the discharge ports O1 to O7 while being polished, and is eventually discharged from the discharge ports O1 to O7.

Further, in this sphere polishing apparatus, the sphere discharged from one of the plurality of polishing grooves through the discharge ports O1 to O7 is transferred to the other grooves of the plurality of polishing grooves through the input ports I1 to I7. A plurality of communication passages 3 for connecting the discharge ports O1 to O7 and the input ports I1 to I7 so as to be charged are further provided . The plurality of communication passages 3 are characterized in that the spheres are arranged so as to pass through all of the plurality of polishing grooves in order.

  More specifically, the transport pipe 31 is extended from each of the discharge ports O1 to O7 provided at one end of the notch portion of the fixed platen 1. Since the inside of this conveyance pipe 31 is filled with oil, it is suppressed that a spherical body collides in the conveyance pipe 31 and is damaged. Further, since the inside of the conveying pipe 31 is coated with fluorine, the frictional resistance is small, and the spherical body is prevented from being damaged by friction with the pipe wall. The transport pipes 31 are connected to the elevators 32, and the transported spheres are raised to a predetermined height. The cutting fluid supplied into the polishing groove and flowing into the conveying pipe 31 together with the sphere naturally falls in the process of raising the sphere by the elevator 32, but the compressed air is blown onto the sphere on the rising path of the elevator 32. An air blowing device 34 that can perform the above operation is provided, and the abrasive debris is separated from the sphere by blowing air. That is, the air blowing device 34 functions as a polishing dust peeling device.

  From the upper part of the elevator 32, supply pipes 33 for supplying the respective spheres to the input ports I1 to I7 are respectively extended toward the input ports I1 to I7. Are connected to each polishing groove via a simultaneous charging device. Since the inside of the supply pipe 33 is also filled with oil, it is suppressed that the spherical bodies collide with each other in the supply pipe 33 and are damaged. The inner peripheral surface of the supply pipe 33 is also coated with fluorine. As described above, the communication passage 3 includes the transport pipe 31, the elevator 32, and the supply pipe 33.

  The simultaneous charging device 50 is a device for simultaneously charging a sphere into each of a plurality of polishing grooves, and more specifically, as shown in FIG. Are provided with a chute 5 having a plurality of grooves 51 connected to each supply pipe 33 and a roller 52. As illustrated in FIG. 3, the roller 52 rotates the spheres supplied to the plurality of grooves 51 with their outer peripheral portions in contact with each other, thereby inserting the spheres from the inlets I1 to I7. Since this roller 52 puts the spheres arranged in a line in the width direction of the groove 51 into each polishing groove at the same time, the pressure applied to each sphere when the sphere is thrown can be minimized. Therefore, the generation | occurrence | production of the soot which arises when an excessive pressure is applied to a spherical body at the time of injection | throwing-in can be suppressed. Further, since at least the outer peripheral portion of the roller 52 is made of urethane, it is possible to prevent the spherical body from being damaged by the outer peripheral portion of the roller 52 coming into contact with the spherical body. Since the rotation of the roller 52 is controlled by the roller control device 53, the number of spheres held in the plurality of polishing grooves can be easily controlled. That is, the roller 52 and the roller control device 53 constitute a sphere number control mechanism that controls the number of the spheres held in the plurality of polishing grooves to a desired constant.

As described above, the plurality of communication passages 3 are formed by the transport pipe 31, the elevator 32, and the supply pipe 33. The plurality of communication passages 3 are provided in the same number as the polishing grooves. Then, the discharge port O1 so that the sphere discharged from one groove of the plurality of polishing grooves through the discharge ports O1 to O7 is input to the other grooves of the plurality of polishing grooves through the input ports I1 to I7. -O7 and the inlets I1-I7 are connected. Further, the plurality of communication passages 3 are arranged so that the sphere passes through all of the plurality of polishing grooves in order. This will be specifically described. For example, when there are seven polishing grooves, L1 to L7 are set in order from the outer peripheral side. Similarly, as shown in FIG. 1, the inlets corresponding to L1 to L7 are I1 to I7 and the outlets are O1 to O7, respectively. Here, one communication passage 3 having one end (conveying pipe 31 side) connected to the discharge port O1 is connected to the other end (supply pipe 33 side) through the chute 5 through the inlet I.
2 is connected. Similarly, one communication path 3 having one end (conveying pipe 31 side) connected to the discharge port O2 has the other end (supply pipe 33 side) connected to the input port I3 via the chute 5. Thereafter, is connected the other communication passage 3 likewise, one communication passage 3 is connected to the discharge port O7 (the transport pipe 31 side) 1 via a chute 5 to the other end (side supply pipe 33) It is connected to the inlet I1. In this way, the plurality of communication passages 3 are respectively disposed so that the sphere passes through all of the plurality of polishing grooves in order.

  Here, since the polishing groove is formed by the fixed groove 11 provided in the fixed platen 1 and the rotary groove provided in the rotary plate 2 as described above, the fixed groove 11 and the rotary groove are arranged concentrically. In view of this, the length decreases from the outer peripheral side toward the inner peripheral side, that is, from L1 to L7. In the past, since each sphere passed through which polishing groove by chance, the sphere that passed through the long polishing groove had a high degree of polishing, and the sphere that passed through the short polishing groove had a high degree of polishing. It was a small result. Even if spheres having a certain degree of polishing were obtained by repeating polishing, the variation was large as a whole. In this embodiment, since all the spheres to be polished pass through all of the polishing grooves in order, it is possible to reduce the variation in the degree of polishing. The same effect can be obtained even when there are variations other than the length of the polishing groove.

According to the spherical polishing apparatus of the above embodiment, the following effects can be obtained.
(1) In the above-described embodiment, the sphere discharged from one of the plurality of polishing grooves (for example, the polishing groove L1) through the discharge port (for example, the discharge port O1) There are provided a plurality of communication passages 3 that connect the discharge port and the input port so as to be input into another groove (for example, the polishing groove L2) of the plurality of polishing grooves via the opening I2). Accordingly, a sphere that has exited from a certain polishing groove (for example, the polishing groove L1) is reliably put into another polishing groove (for example, the polishing groove L2), and repeatedly put into the same polishing groove (for example, the polishing groove L1). Will not be polished. Further, since the plurality of communication passages 3 are arranged so that the spheres pass through all of the plurality of polishing grooves in order, all the spheres are held in all the polishing grooves L1 to L7 approximately the same number of times. It is polished by. Therefore, even when there are variations in the polishing characteristics of the respective polishing grooves, all the spheres can be brought into an average polishing state by increasing the number of polishing times. In addition, since the spheres are arranged so as to pass through all of the plurality of polishing grooves L1 to L7 in order, the number of times the spheres are charged, that is, the number of polishing times can be completely controlled. It is possible to further reduce the variation of the.

  (2) In the above-described embodiment, the introduction ports I1 to I7 are provided with the simultaneous introduction device 50 for simultaneously introducing the spheres into the grooves of the plurality of polishing grooves. Pressure can be minimized. Therefore, the generation | occurrence | production of the soot which arises when an excessive pressure is applied to a spherical body at the time of injection | throwing-in can be suppressed.

  (3) In the above embodiment, since the sphere number control mechanism for controlling the number of spheres held in the plurality of polishing grooves to a desired constant is provided, the number of spheres held in the polishing grooves is set to a constant number during polishing. Can keep. Accordingly, when a fixed pressure is applied to the fixed platen 1 and the rotary platen 2, the pressure applied to one sphere is the same during polishing. As a result, since all the spheres to be polished are polished while always receiving the same pressure, it is possible to further reduce the variation in the polishing state of the spheres.

(4) In the above-described embodiment, since the roller 52 for feeding the sphere from the inlets I <b> 1 to I <b> 7 is provided by rotating the sphere while bringing the outer peripheral portion into contact with the sphere, the sphere can be easily fed simultaneously by the rotation of the roller 52. Further, by controlling the number of rotations of the roller 52, the number of spheres held in the plurality of polishing grooves can be easily controlled to a desired constant.

(5) In the above embodiment, the simultaneous throwing device 50 rotates the sphere while the outer peripheral portion is in contact with the sphere, and the roller 52 that feeds the sphere from the charging ports I1 to I7 and the roller control device 53 that controls the rotation speed of the roller 52. With. Therefore, by controlling the rotation speed of the roller 52 by the roller control device 53, the number of spheres held in the plurality of polishing grooves L1 to L7 can be easily controlled to a desired constant.

  (6) In the above embodiment, the elevator 32 in the communication passage 3 is provided with the air blowing device 34 that functions as a polishing dust peeling device that peels the polishing dust attached to the sphere from the sphere. Since the passed sphere is polished again with the polishing debris removed, it is possible to prevent the sphere from being damaged by the polishing debris.

(7) In the above embodiment, since the spheres and portions contacting the carrier tube 31 and the supply pipe 33 constituting the communication passage 3 is fluorine coated, transport spheres from the discharge port O1~O7 to inlet I1~I7 The frictional resistance at the time of carrying out becomes small, and transportation becomes smooth. Further, the spherical body can be prevented from being damaged in the communication passage 3.

In addition, you may change the said embodiment as follows.
In the above embodiment, the inner peripheral surfaces of the conveyance pipe 31 and the supply pipe 33 in the communication passage 3 , that is, the portions that come into contact with the spheres are coated with fluorine, but other configurations may be used. In short, since it is only necessary to prevent damage to the steel balls, other lubrication methods may be used, or only one of them may be coated. If it is not a problem that the spherical body is damaged in the communication passage 3 , the coating may be omitted to reduce the cost.

  In the above embodiment, the air blowing device 34 is provided in the elevator 32 as a polishing dust peeling device that peels polishing dust generated by polishing and adhered to the sphere from the sphere. Also good. For example, if there is no problem in installation, it may be provided anywhere on the communication path 3, not the elevator 32. Moreover, since it is only necessary to peel off the polishing debris from the sphere, a cleaning device using oil cleaning or the like may be provided instead of the air blowing device 34.

In the above-described embodiment, the simultaneous charging device 50 includes the roller 52 that loads the sphere from the loading ports I1 to I7 by rotating the sphere with the outer peripheral portion in contact with the sphere, but may have other configurations. . In short, since it is only necessary to simultaneously insert the spheres, for example, an openable / closable baffle plate that prevents passage of the sphere in the closed state may be provided on the chute 5, and the spheres may be simultaneously inserted by opening / closing the baffle plate. .

In the above embodiment, the groove 51 is curved corresponding to the shape of the roller 52 at the portion where the roller 52 is in contact with the sphere. However, as shown in FIG. The shape of the roller 52 is not particularly limited as long as the sphere can be inserted into the insertion ports I1 to I7 by rotating the roller 52 with the outer peripheral portion in contact with the sphere.

In the above embodiment, the roller 52 is made of urethane, but may have other configurations. Since it is sufficient that the sphere is not damaged, other soft materials such as rubber may be used.
In the above-described embodiment, the simultaneous charging device 50 rotates with the outer periphery contacting the sphere, and the roller 52 that loads the sphere from the loading ports I1 to I7 and the roller control device 53 that controls the rotation speed of the roller. The number of spheres held in the plurality of polishing grooves is controlled by controlling the number of rotations of the roller by the roller control device 53. However, other configurations may be used. Since it is only necessary to be able to control the number of spheres held in a plurality of polishing grooves, for example, the spheres held in the polishing grooves with sensors and counters attached to the inlets I1 to I7 and the outlets O1 to O7. The number of spheres may be directly controlled based on the calculation result.

According to the above Symbol structure, comprising a spherical number control mechanism for controlling the number of spheres held in a plurality of polishing grooves to a desired predetermined number, it is kept constant number at the time of polishing a number of spheres held on the polishing groove Can do. Accordingly, when a fixed pressure is applied to the fixed platen 1 and the rotary platen 2 , the pressure applied to one sphere is the same during polishing. As a result, since all the spheres to be polished are polished while always receiving the same pressure, it is possible to further reduce the variation in the polishing state of the spheres. The point is that if each sphere to be polished is polished while always receiving the same pressure, the variation in the polished state of the sphere can be further reduced, so other configurations may be used. . For example, the pressure applied to the fixed platen 1 and the rotary platen 2 may be changed in accordance with the number of spheres held in the polishing groove.

In the above-described embodiment, the charging ports I1 to I7 are provided with the simultaneous charging device 50 for simultaneously loading the spheres into the grooves of the plurality of polishing grooves, but other configurations may be used. The purpose is to minimize the pressure applied to each sphere when the sphere is inserted and to suppress the generation of scratches caused by excessive pressure applied to the spheres. May be taken. In addition, if the occurrence of scratches at the time of charging does not become a problem, the simultaneous charging device 50 may be omitted to reduce the cost.

Examples of spherical polishing using the spherical polishing apparatus described in the above embodiment are shown below.
[Sphere polishing apparatus and polishing method]
Using a fixed plate made of cast iron and a rotating plate made of a grindstone material, seven polishing grooves were formed concentrically. The plurality of communication passages were respectively arranged so that the spheres passed through all of the plurality of polishing grooves in order from the outer peripheral side. Seven rows of steel balls having a diameter larger than 3/8 inch were simultaneously introduced into the sphere polishing apparatus as the sphere to be polished, and the charging speed was adjusted so that the number of spheres held in the polishing groove was constant at the same time. Since the stationary platen and the rotating plate were pressurized at a constant pressure, the pressure applied to each sphere was polished in a constant state. In addition, the rotation speed of the rotating disk was kept constant throughout the polishing process. With this sphere polishing apparatus, the steel balls were polished to a standard size based on the average diameter of the steel balls. In this process, 20 spheres were sampled from each row every hour, and the following measurements / calculations were made.

[Diameter measurement]
Each sphere is measured randomly at five locations with a micrometer.
〔Maximum value〕
Let the average value of the measurement result of said 5 places be an average diameter of a sphere. Of the 20 spheres sampled at the same time, the largest average diameter is taken as the maximum value.

〔minimum value〕
Let the average value of the measurement result of said 5 places be an average diameter of a sphere. Of the 20 spheres sampled at the same time, the value with the smallest average diameter is taken as the minimum value.

〔Average value〕
Let the average value of the measurement result of said 5 places be an average diameter of a sphere. The average of the average diameters of 20 spheres sampled at the same time is obtained and set as the average value.

[Mutual difference]
A difference between the maximum value and the minimum value is defined as a mutual difference. The calculation result is shown in FIG.
[Diameter unmatched]
Among the measured values of the diameters of the five locations of one sphere, the difference between the maximum diameter and the minimum diameter is assumed to be the same. Further, the average of the diameters of the 20 spheres sampled at the same time is obtained, and the average diameter is determined to be the same. The calculation result is shown in FIG.

(Comparative Example 1)
It has the same structure except that it uses a sphere supply device that recirculates the sphere to the input port via an input chute that is extended from the input port by moving it using a conventional conveyor instead of a plurality of communication passages. The spheres were polished using a sphere polishing apparatus. The charging speed at this time was adjusted to be the same as in Example 1. At the same time, the number of spheres held in the polishing groove was adjusted to be the same as in Example 1. Since the stationary platen and the rotating plate were pressurized at a constant pressure, the pressure applied to each sphere was polished in a constant state. In addition, the rotation speed of the rotating disk was kept constant throughout the polishing process. With this sphere polishing apparatus, the steel balls were polished to a standard size based on the average diameter of the steel balls. In this process, 20 spheres were sampled from each row every hour, and [Diameter measurement], [Maximum value], [Minimum value], [Average value], [Mutual difference], [Any diameter] was measured or calculated. FIG. 6 shows the calculation results of [mutual difference] and [diameter difference].

(Comparison result)
When FIG. 5 and FIG. 6 are compared, both the difference and the difference in diameter are better in Example 1. In particular, the mutual difference is 1/2 or less that of Comparative Example 1, and it can be seen that the variation between the spheres is greatly reduced. In addition, the time-dependent variation (out of the wave in the graph) that was remarkable in both the mutual difference and the diameter difference is also reduced. Therefore, it can be said from the comparison between Example 1 and Comparative Example 1 that the variation in polishing between the spheres in this example could be suppressed as compared with the comparative example.

  Since the present invention relates to a sphere polishing apparatus characterized by a sphere supply apparatus, it can be widely used as a sphere polishing apparatus for creating a sphere used for a bearing or the like.

  DESCRIPTION OF SYMBOLS 1 ... Fixed disk, 2 ... Rotating disk, 3 ... Communication path, 5 ... Chute, 10 ... Fixed grinding | polishing surface, 11 ... Fixed groove | channel, 20 ... Rotation grinding | polishing surface, 31 ... Conveying pipe, 32 ... Elevator, 33 ... Supply pipe, 34 ... Air spraying device, 50 ... Simultaneous injection device, 51 ... Groove, 52 ... Roller, 53 ..Roller control device, 101... Fixed plate, 102... Rotating plate, 103... Sphere supply device, 104... Discharge chute, 105. DESCRIPTION OF SYMBOLS 111 ... Fixed groove | channel, 120 ... Rotary grinding | polishing surface, 121 ... Rotation groove | channel, 131 ... Conveyor, 141 ... Recessed part, I1-I7 ... Input port, O1-O7 ... Discharge Exit.

Claims (4)

  A sphere polishing apparatus for polishing a sphere,
  The spherical polishing apparatus has a stationary platen, a rotating plate, a plurality of input ports, a plurality of discharge ports, a plurality of communication passages, and a simultaneous input device,
  The fixed platen has a fixed polishing surface and a plurality of fixed grooves,
  The fixed groove is formed in the fixed polishing surface, the cross-sectional shape is semicircular, the shape on the fixed polishing surface is substantially circular,
  The plurality of fixing grooves are formed concentrically,
  The rotating disk has a rotating polishing surface and a plurality of rotating grooves, and rotates with respect to the fixed disk.
  The rotary groove is formed on the rotary polishing surface, the cross-sectional shape is semicircular, the shape on the rotary polishing surface is substantially circular,
  The plurality of rotating grooves are formed concentrically,
  When the fixed polishing surface and the rotating polishing surface are opposed to each other, the fixed plate and the rotating plate form a plurality of polishing grooves by the fixed groove and the rotating groove facing each other,
  Each of the plurality of inlets throws a sphere into a corresponding one of the plurality of polishing grooves,
  Each of the plurality of discharge ports discharges the sphere from a corresponding one of the plurality of polishing grooves,
  The plurality of communication passages connect the discharge port for discharging the sphere from one of the two adjacent polishing grooves and the input port for supplying the sphere to the other of the two adjacent polishing grooves, The discharge port for discharging the sphere from one of the outermost polishing groove and the innermost polishing groove among the plurality of polishing grooves, the outermost polishing groove and the most outermost of the plurality of polishing grooves The other inlet of the polishing groove on the inner circumference is connected to the inlet for introducing the sphere, and by these connection structures, the sphere discharged from one of the polishing grooves is transferred to the next polishing groove in the order of discharge. And pass through all of the plurality of polishing grooves in order,
  The simultaneous throwing device has a roller and a roller control device, and simultaneously throws the sphere into the plurality of throwing ports,
  The roller is formed of a soft material, and rotates the outer peripheral portion of the roller in contact with the sphere, thereby throwing the sphere into the inlet.
  The roller control device controls the number of the spheres held in the plurality of polishing grooves by controlling the number of rotations of the roller.
  Sphere polishing equipment.   Each of the plurality of communication passages has a conveyance pipe at least in part,
  The inside of the transport pipe is filled with oil
  The sphere polishing apparatus according to claim 1.   The sphere polishing device has a polishing dust peeling device,
  The polishing debris peeling device peels the polishing debris adhering to the sphere from the sphere.
  The sphere polishing apparatus according to claim 1 or 2.   In the communication passage, the contact portion with the sphere is coated with fluorine.
  The spherical body polisher as described in any one of Claims 1-3.

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