JPS61241057A - Method and device for grinding cylindrical surface of cylindrical or column-shaped work - Google Patents

Abstract

PURPOSE:To grind cylindrical surface efficiently and uniformly by placing cylindrical or column-shaped work to be ground level in a horizontal type cylindrical grinding trough, and by agitating a dry medium both by orbiting and rotation round own axis. CONSTITUTION:A plurality of works to be ground 36 are fixed to jigs 20, 27, and a dry type medium 37 is put in a grinding trough 8. Together with main shaft 4, a support 12, coupling shaft 22, support 21 and follower shaft 6 are rotated by a motor 28 so as to the shafts 17, 26 which are rotating round own axies. This rotation allows a planet gear 19 meshing with a fixed gear 16 to roll and spin round its own axis so as to permit each work 36 to orbit and spin round own axis. The grinding trough 8 is rotated by another motor 32. Rotation of these members provides effective agitation of the medium 37, which flows well to polish the outside cylindrical surface of the work 36. Thereby the cylindrical surface of a comparatively long cylindrical or column-shaped work can be automatically polished quickly, efficiently and uniformly throghout the surface concerned.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of polishing the outer peripheral surface of a cylindrical object or a columnar object, and particularly relates to a method and apparatus for automatically polishing the outer peripheral surface of a cylindrical object or a columnar object using a dry flow polishing method. .

Various methods have been proposed for automatically polishing the outer peripheral surface of cylindrical objects and cylindrical objects, but these methods mainly employ the puff polishing method and the belt polishing method. This is a method in which the surface of a cylindrical object or cylindrical object is gradually polished from one end in the axial direction to the other end. Alternatively, the method for polishing the outer circumferential surface of a columnar object is to use a puff or belt that uses only the convex portion as a tool for cylindrical objects or columnar objects that have patterns on the outer circumferential surface, high unevenness, or large and small grooves. It also has drawbacks such as the inability to polish deep recesses.

Conventionally, as a method for polishing cylindrical or columnar objects, there is also a known method in which the cylindrical or columnar object is placed in a fluidized medium and its outer peripheral surface is polished. Although it is effective for small objects or columnar objects, it is difficult to apply to relatively long objects to be polished.In this case, the object to be polished is supported on a spindle, and approximately half of the object to be polished is first inserted into the fluid media. After surface polishing, the object to be polished is removed from the spindle, then the object to be polished is turned upside down and reattached to the spindle, and the remaining half of the object to be polished is inserted into a fluid medium and the surface is polished. However, this method is troublesome to operate as described above, and also causes problems such as variations in the polished surfaces of the first half and the remaining half.

On the other hand, a method has also been proposed in which the workpiece (glasses) is fixed with a jig using a dry barrel or the like and the workpiece is polished (JP-A-57
However, this method has the drawback that the inner peripheral side cannot be polished well even if the polishing tank is rotated in the forward and reverse directions.

The present invention was made in view of the above circumstances, and provides a method and apparatus for polishing a cylindrical or columnar object that can efficiently and uniformly polish the outer peripheral surface of a relatively long cylindrical or columnar object. The purpose is to

In order to achieve the above object, the present invention arranges a cylindrical or columnar object to be polished along the horizontal direction in a horizontal cylindrical polishing tank with both end faces closed. , the object to be polished is made to revolve around the central axis of the polishing tank and rotate at the same time, and the dry media placed in the polishing tank is agitated and fluidized by the object to be polished that revolves and rotates on its own axis. At the same time, by bringing the flowing dry media into contact with the outer circumferential surface of the object to be polished, whose position relative to the central axis of the polishing tank gradually changes due to the revolution and rotation, the outer circumferential surface of the object to be polished is polished. This is what I did.

According to the method of the present invention, since the dry media is agitated and fluidized by the object to be polished that revolves and rotates, the media is effectively stirred, and this fluid media applies effective pressure to the outer peripheral surface of the object to be polished. The outer circumferential surface of the object to be polished is well polished by contact, and the relative position of the object to be polished gradually changes with respect to the central axis of the polishing tank, so that the fluid media is deflected into contact with the outer circumferential surface of the object to be polished. There is no contact, and the entire outer circumferential surface is in uniform contact, so that the outer circumferential surface of the object to be polished is uniformly polished. In addition, since the fluid media comes into contact with the entire outer peripheral surface of the object to be polished, the entire surface is polished at the same time, and even if the object to be polished is long, it can be automatically polished efficiently and uniformly in a short time.

In this case, by rotating the polishing tank separately from the revolution and rotation of the object to be polished, the agitation and flow of the media can be more effectively assisted, and the object of the present invention can be more effectively achieved. Here, for effective agitation flow of such media and efficient uniform polishing of the outer peripheral surface of the object to be polished, the revolution speed of the object to be polished should be 5 to 150 rpm, and the rotation speed should be 10 to 45 rpm.
It is recommended that the rotation speed of the polishing tank be set at 0 rpm, and furthermore, at a rotation speed of 10 to 50 rpm.

Further, as an apparatus for carrying out the method of the present invention, there is provided a horizontal cylindrical polishing tank with both end faces closed, and a polishing tank arranged along the horizontal direction, with one end extending from the center of one side plate of the polishing tank. The main rotating shaft extends through the polishing tank and projects into the polishing tank, and is connected to a drive source for rotating the main rotating shaft at the other end and is rotated by the drive source. A slave rotating shaft that penetrates through the center of the other side plate of the polishing tank and projects into the polishing tank, and is fixed to the respective protruding ends of the two rotating shafts, and a sub-rotary shaft that faces the protruding one end of the main rotating shaft, and A support body on which multiple rotation axes are rotatably attached along the circumferential direction, a connecting shaft connecting these supports, and a planetary gear fixed to the rotation axis attached to one of the supports mesh with each other. , and with a fixed gear fixed to a fixed shaft.

and a jig which is fixed to the rotating shaft and horizontally supports a cylindrical or columnar object to be polished, and is connected to one support body integrally with the rotation of the main rotating shaft via a connecting shaft. By rotating the other support body and the slave rotating shaft, the object to be polished is caused to revolve around the central axis of the polishing tank, and the object attached to this is rotated by the rotation of the one support body. A device is provided in which the object to be polished is rotated by rotating a planetary gear fixed to a rotating shaft while meshing with a fixed gear, and the method of the present invention is preferably carried out by this device. can be implemented.

In this case, in order to rotate the polishing tank, bearing boxes are rotatably attached to both rotating shafts via bearings, the polishing tank is fixed to these bearing boxes, and this bearing box is attached to one of the bearing boxes. An effective means is to connect a drive source for rotating the polishing tank integrally therewith.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of the apparatus of the present invention. In the figure, 1 is a base, and on this base 1, two supports 2.3 are mounted at a predetermined distance from each other. Fixed.

One of the support bases 2 has a cylindrical main rotating shaft 4 arranged along the horizontal direction, and two bearings 5 fixed to the support base 2.
. 7,
It is rotatably supported by 7.

8 is a horizontal barrel polishing tank in the shape of an octagonal cylinder with both ends closed.
Bearing boxes 10, 10 are fitted and fixed in bearing box mounting holes 9, 9 formed in the center of both side plates 8a, 8a of this polishing tank 8, respectively. , 11 to the front end sides of the main rotary shaft 4 and the slave rotary shaft 6, respectively, so as to be rotatable relative to these shafts 4 and 6, and when the bearing box 10.10 rotates, it becomes integral with the shafts. The polishing tank is rotatable. Although not shown, the outer peripheral wall 8b of the polishing tank
A part of the outer peripheral wall is removable.
By removing a part of b, the object to be polished is placed in the polishing tank 8.
It is designed to be able to be taken in and taken out.

A hollow disk-shaped object support 12 is fixed to the tip of the main rotating shaft 4 that protrudes into the polishing tank 8 , and a base end is fixed to the main rotating shaft 4 . A fixed shaft 14 is provided, which is fixed to a fixed frame 13 fixed to one of the support stands 2 and whose tip protrudes into the object support 12 . here.

A bearing 15°15 is provided between the main rotating shaft 4 and the fixed shaft 14.
is provided so that the main rotating shaft 4 can rotate relative to the fixed shaft 14.

A ring-shaped fixed gear 16 is fixed to the tip of the fixed shaft 14 that projects into the support body 12 . Further, within the support body 12, there are a plurality of (two in the drawings) main rotation shafts 17.
17 is arranged and rotatably supported by bearings 1B, 1B, and ring-shaped planetary gears 19.19 are respectively fixed to these rotation shafts 17.17, and these planetary gears 19.19 are respectively connected to the above-mentioned It is meshed with the fixed gear 16. Note that the tip of the rotation shaft 17.17 protrudes outside through the side wall of the support 12, and a jig 20.20 is fixed to the tip.

Further, a disk-shaped object support 21 is fixed to the tip of the slave rotating shaft 6 that protrudes into the polishing tank 8, and the center of this support 21 is connected to the one support 12. are connected to each other by a connecting shaft 22, and when one support body 12 rotates, the other support body 21 can rotate together with it. Moreover, this other support body 21
A plurality of pieces (
In the drawing, two (2) mounting holes 23 and 23 are drilled,
End-rotating shaft holders 24, 24 each having a cylindrical shape with a bottom are fitted and fixed into these mounting holes 23, 23.

In these holding bodies 24, 24 there are bearings 25°25.
Inner rotation shafts 26.26 are rotatably supported by the inner rotation shafts 26.26, and at the tips of these inner rotation shafts 26.26, the jig member 2 is protruded outward from the holder 24.24.
7.27 are fixed respectively. Note that these jig members 27.27 are arranged to face the one jig member 20.20, respectively, and for this purpose, mounting holes 23.23 are drilled for inserting and fixing the holding body 24.24. The location is selected appropriately.

A main rotating shaft rotation motor 28 is fixed to the base 1, a pulley 29 fixed to the rotating shaft of the motor 28, and a pulley 30 fixed to the base end side of the main rotating shaft 4.
A belt 31 is stretched between the motor 28 and the main rotating shaft 4, which is rotated by the drive of the motor 28.A polishing tank rotation motor 32 is also fixed on the base 1, and the rotation of this motor 32 A belt 35 is stretched between a pulley 33 fixed to the shaft body and a pulley 34 fixed to the bearing box 10 rotatably attached to the slave rotating shaft 6, and one of the bearing boxes is driven by the motor 32. 10 rotates, and the polishing tank 8 is rotated together with it.

Next, a method for polishing the outer circumferential surface of a cylindrical or columnar object to be polished using the above-mentioned apparatus will be explained. First, a part of the outer circumferential wall 8b of the polishing tank 8 is removed,
Place the objects 36, 36 to be polished into the polishing tank 8, attach and fix the objects 36, 36 to the jig members 20, 20, 27, and 27, respectively, and place the media 37 into the polishing tank 8. Pour about 1/3 to 1/2 of the capacity into the polishing tank 8.
Reinstall the outer peripheral wall that was removed. Here, the media include organic media, particularly preferably wood media, such as wood shavings, small pieces of wood, and corn.

Materials such as granular, powdery, and flaky fabric media such as nuts, bark, and bamboo whose surfaces are coated with oil and abrasive grains are effectively used.

After preparations have been made in this manner, both motors 28 and 32 are driven to perform polishing.

That is, by driving the main rotating shaft rotation motor 28, the main rotating shaft 4 rotates, and one support body 12 is rotated integrally with the main rotating shaft 4.
．． Connection shaft 22. The other support body 21° is rotated by the slave rotation shaft 6, and the rotation shafts 17.17, 26, 26. attached to both supports 12.21, respectively. Furthermore, there are fixtures 20, 20, 2 on these rotational axes 17° 17, 26, 26.
The object to be polished 36.36, which is fixed via 7°27, rotates (revolutions around the connecting shaft 22 (the central axis of the polishing tank 8)), and in addition, the main rotation axis 17°17 rotates in this way. (
As the planetary gears 19.
19 is the main rotational axis 17° As the 17 revolves, the fixed gear 16
The planetary gears 19.19 rotate around the fixed gear 16, and the main rotation shaft 17.17 rotates together with the planetary gears 19.19.
．． 36 rotates. Further, by driving the polishing tank rotation motor 32, the polishing tank 8 is rotated via a bearing box 10 rotatably attached to the slave rotating shaft 6.

Therefore, due to the revolution and rotation of the object to be polished 36.36 and the rotation of the polishing tank 8, the media 37 introduced into the polishing tank 8 is effectively stirred and flowed, and is coated on the outer circumferential surface of the object to be polished 36.36. Since the contact is made with effective pressure, the outer peripheral surface of the object to be polished 36, 36 is well polished. Moreover, in this case, since the objects to be polished 36.36 revolve and rotate as described above, the connecting shaft 22 (polishing tank 8) of the objects to be polished 36.36
As a result, the contact state of the fluid media 37 is not deflected, so that all parts of the outer circumferential surface of the object to be polished 36, 36 are polished evenly, and uneven polishing etc. There is no inconvenience caused. In addition, since the media 37 contacts the entire outer peripheral surface of the object 36.36 simultaneously and uniformly in this way, the polishing time is shortened, efficient polishing is performed, and the object 36.36 to be polished can be polished evenly. The outer peripheral surface of any object can be efficiently and evenly polished.

That is, as shown in FIG. 2, point A of the object to be polished 36 is
As the object to be polished 36 revolves (R direction in the figure) and rotates (r direction in the figure), its relative position with respect to the central axis C of the polishing tank 8 or the inner circumferential wall of the polishing tank 8 gradually changes. Since the position of the outer circumferential surface of the object to be polished 36 relative to the inner circumferential wall of the polishing tank 8 changes every moment, there is no deflection in the way the media 37 hits the outer circumferential surface of the object to be polished (note that the media 37 is When the media 37 rotates in the direction M, it flows in the M direction), and the way the media 37 hits any part of the surface of the object 36 to be polished is averaged, so that the outer peripheral surface of the object 36 as shown in FIG. is evenly polished.

On the other hand, as shown in FIG. 4, when the object to be polished 36 is not rotated, even if it is revolved, the point A of the object to be polished 36 is the center axis C of the polishing tank 8 or the polishing tank 8. Since there is no change in its position with respect to the inner circumferential surface, the media 37 mostly hits the surface of the object to be polished 36 facing the polishing tank (outside), but it hits less of the surface facing the central axis (inside). As shown in FIG. 5, the outside of the object to be polished 36 is polished a lot, while the inside is hardly polished.

Here, the revolution number of the object to be polished 36.36 is 5 to 150 rpm.
m, especially 10-80 rpm, rotation speed 10-450 rpm
m, preferably 20 to 250 rpm, and the rotation speed of the polishing tank 8 is 10 to 50 rpm, especially 15 to 3
It is preferable to set the speed to 5 rpm, as this allows the media to flow more effectively, thereby further achieving the purpose of the present invention, which is to automatically polish the outer circumferential surface of the object to be polished 36, 36 efficiently and uniformly in a short time. definitely achieved.

After polishing as described above, both motors 28.32
, a part of the outer peripheral wall 8b of the polishing tank 8 is removed, and the objects to be polished 36, 36 are placed in the jig members 20, 20, 27, .
27 and taken out from the polishing tank 8.

In the apparatus of the above-described embodiment, the polishing tank 8 is rotated, but in this case, the polishing tank 8 can also be rotated in only one direction, and especially when the object to be polished 36 has a complicated shape. can be rotated forward and backward at predetermined time intervals. Further, if necessary, it may be made to swing around the connecting shaft 22, and depending on the case, polishing can be performed in a stationary state. Furthermore, a polishing tank 8, a support body 12, a jig member 2
The shape of 0.27 etc. can also be changed as appropriate.

Furthermore, the apparatus of the present invention uses a cylindrical or columnar spindle instead of the object to be polished 36.
In addition to supporting the spindle in the horizontal direction, a suitable object support member is attached to this spindle, and the object to be polished (not limited to a cylindrical object or a columnar object) can be attached to this support member for polishing. For example, some metal Western tableware items have complex shapes, and there are parts that cannot be automated with puff polishing, but the method of the present invention is especially suitable for polishing the necks of spoons, the edges of plates, and between the pawls of forks. As shown in FIGS. 6 and 7, Western tableware 38 is held between two holding rods 40 and 40 having rubber layers 39 and 39 formed inside, and these holding rods 40 and 40 (spindles) The Western-style tableware 38 can be polished while being supported by the jig 20° 27, and thereby a large number of Western-style tableware can be attached and polished efficiently. Other configurations may also be modified in various ways within the scope of the gist of the present invention.

Effects of the Invention According to the present invention, it is possible to automatically polish the outer circumferential surface of a relatively long cylindrical object or columnar object in a short time, efficiently, and evenly over the entire surface, especially rolls such as cam rolls and copy rolls. In addition to precision polishing of metals, pipes, and gears, it is also suitable for polishing general metals as an alternative to puff polishing.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the device of the present invention. Fig. 2 is a schematic cross-sectional view of a polishing device illustrating the polishing state of the method of the present invention, Fig. 3 is a cross-sectional view of an example of a polished object polished by the method of the present invention, and Fig. 4 is the polishing state of the comparative method. 5 is a sectional view showing an example of a polished object polished by a comparative method; FIG. 6 is a sectional view showing an example of a method for attaching Western tableware; FIG. is a schematic plan view of the same. 1... Base, 2... Support stand, 3... Support stand, 4
...Main rotating shaft, 5... Bearing, 6... Slave rotating shaft,
7... Bearing, 8... Polishing tank, 8a... Both side plates. 8b...Outer peripheral wall, 9...Mounting hole, 10...Bearing box, 11...Bearing, 12...Support body, 13...Fixed frame, 14...Fixed shaft, 15・・・Bearing, 16...
・Fixed gear. DESCRIPTION OF SYMBOLS 17... Main rotation axis, 18... Bearing, 19... Planetary gear, 20... Jig member, 21... Support body, 22...
...Connection shaft, 23...Mounting hole, 24...Holding body, 2
5... Bearing, 26... Axis rotation shaft, 27... Jig member, 28... Main rotating shaft rotation motor, 29... Pulley, 30... Pulley, 31... Belt, 32...
Polishing tank rotation motor, 33...Pulley, 34...Pulley, 35...Belt, 36...Object to be polished, 37...
··media.

Claims (1)

[Claims] 1. A cylindrical or columnar object to be polished (36) is arranged horizontally in a horizontal cylindrical polishing tank (8) with both end faces closed, and the object to be polished ( 36) into the polishing tank (8).
) around the central axis of the object (3) and rotated at the same time, the dry media (37) introduced into the polishing tank (8) is rotated along the center axis of the object (3)
6), the flowing dry media (37) is brought into contact with the outer peripheral surface of the object (36) to be polished, whose relative position to the central axis of the polishing tank (8) gradually changes due to the revolution and rotation. A method for polishing the outer circumferential surface of a cylindrical or columnar object, which comprises polishing the outer circumferential surface of the object (36) to be polished. 2. The polishing method according to claim 1, wherein the object to be polished (36) has a revolution speed of 5 to 150 rpm and an autorotation speed of 10 to 450 rpm. 3. The polishing tank (8) is rotated separately from the revolution and rotation of the object to be polished (36) to assist the agitation and flow of the dry media (37).
Polishing method described in section. 4. The polishing method according to claim 3, wherein the rotation speed of the polishing tank (8) is 10 to 50 rpm. 5. A horizontal cylindrical polishing tank (8) with both end faces closed, arranged along the horizontal direction, with one end passing through the center of one side plate (8a) of the polishing tank (8). Tank (8)
A main rotating shaft (4) that protrudes inward and is connected to the other end of the main rotating shaft (4) and rotated by the drive source (28) for rotating the main rotating shaft; A sub-rotary shaft (one end of which protrudes into the polishing tank (8) through the center of the other side plate (8a) of the polishing tank (8) and faces one protruding end of the main rotary shaft (4); 6), and a plurality of rotation shafts (17, 26) fixed to the protruding ends of the two rotation shafts (4, 6), respectively, and extending along the circumferential direction.
) is rotatably attached to a support (16, 21);
A connecting shaft (22) connecting these supports (16, 21)
) and a rotating shaft (1) attached to one support (16).
7), and a fixed gear (16) fixed to the fixed shaft (14), and a cylindrical or columnar cover fixed to the rotation shaft (17, 26). Jig members (20, 27) that horizontally support the abrasive object (36)
One support (16) is integrated with the rotation of the main rotation shaft (4), the other support (21) is connected to this via a connection shaft (22), and a slave rotation By rotating the shaft (4), the object to be polished (36) is placed in the polishing tank (
A planetary gear (19) is fixed to a fixed gear (16) by rotating the one support (16) and fixed to a rotating shaft (17) attached to the support (16). A device for polishing the outer periphery of a cylindrical or columnar object, characterized in that the object to be polished (36) is rotated by rotating the object while meshing with the object. 6. Bearings (11, 1
The bearing boxes (10, 10) are rotatably mounted through the bearing boxes (10, 10), and the polishing tank (
8) is fixed, and one bearing box (10) is connected to a polishing tank rotation drive source (32) that rotates this bearing box (10) and the polishing tank (8) integrally therewith. The polishing device according to scope 5.