JPS582030B2 - Red-spotted bear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention involves arranging three or more elongated rolls that serve as abrasive material so that their ends intersect with each other at equal intervals.
The present invention relates to a surface polishing device for a metal round bar, in which the surface of the metal round bar to be polished is continuously polished by rotating each roll while revolving the rolls and passing through the center of the intersection of the rolls.

Conventionally, the main method used to polish and finish the surface of a metal round bar was to pressurize and smooth the surface of the metal round bar using rolling rolls. However, if there are pinholes, scratches, etc. on the surface of the metal round bar, had the disadvantage that they were also compressed at almost the same depth and remained on the surface.

However, in this invention, three or more rolls are evenly crossed around the round metal bar to be polished, the rolls are made to revolve around the round metal bar, and each roll is rotated in a direction opposite to the direction of revolution. Since the surface of the round metal rod to be polished is moved and polished by the rolls, pinholes and scratches on the surface of the material are eliminated or reduced, thereby solving the above-mentioned drawbacks of the conventional method.

That is, to explain this invention with reference to an embodiment, bearings 2, 2 are fitted in a cylindrical frame 1 so as to be slidable in the axial direction.
Then, the two cylinder rings 3, 3 are fitted facing each other.

Thereby, the cylindrical rings 3, 3 are rotatably and slidably supported.

The bearing and the cylindrical ring constitute a support member for the roll.

Next, between the cylindrical rings 3, 3, three rolls 4, 4 made of hard material such as tungsten carbide or ceramics are placed along the axis 18 of the cylindrical rings 3, 3 (the center line of the passage of the metal round bar 17 to be polished). The ends of the rolls 4, 4 are supported by bearings 5, 5 which are tiltably installed at the ends of the cylindrical rings 3, 3, and the rolls 4,
The outer peripheries of the transmission rolls 6, 6 at both ends of 4 are brought into contact with the friction surfaces 8 of friction beds 7, 7 installed at both ends of the cylindrical frame 1.

Guide shafts 9, 9 are installed in the friction bed 7, and the guide shafts 9
are the guide holes 11 of the end plate 10 screwed onto both ends of the cylindrical frame 1;
A spring 20 is inserted into the guide shaft between the end plate 10 and the friction bed 7 to maintain the friction bed 7 and the transmission roll of the roll 4 at an appropriate contact pressure.

Next, as a drive mechanism of the surface polishing mechanism for the metal round bar having the above configuration, the belt groove 12 provided on the side wall of the cylindrical rings 3, 3.
12 and a driving wheel 13.1 installed parallel to the cylindrical frame 1.
A timing belt 14.14 is applied to the two drive wheels 14 and 3, and the drive wheels 13.13 are connected to each other via a torque regulator 15, and one of the drive wheels 13 is connected to a drive device 16.

In the above embodiment, the metal round rods 17 to be polished are sequentially inserted into the cylindrical rings 3, 3 along the axis 18 of one of them in the direction of the solid line arrow 19, and the drive device 16 is operated, and the torque regulator 15 is set to a predetermined value, the roll 4.4 revolves around the metal rod 17 to be polished, and the friction between the circumferential surface of the transmission roll 6 of the jaws 4, 4 and the friction bed 7 increases. Due to frictional conduction with the surface 8, it rotates in a direction opposite to the direction of revolution, and the surface of the round metal rod 17 to be polished is polished by the rolls 4, 4.

However, since the direction of rotation of the rolls 4, 4 is opposite to the direction of revolution, the amount of friction with the surface of the round metal bar 17 to be polished is large.
Polishing processing speed can be increased.

Further, by adjusting the amount of torque transmitted by the torque regulator 15, the amount of twist of the cylindrical rings 3, 3 supporting the rolls 4, 4 can be made variable, and the polishing by the rolls 4.4 on the axis 18 can be made variable. The pressure in contact with the polished gold round bar 17 having an effective diameter of 4.4 mm can be set to an appropriate value.

The friction between the rolls 4, 4 and the surface of the metal round bar 17 is caused by the fact that the rolls 4, 4 are oblique to the axis 18 and the rolls 4, 4 rotate in the opposite direction to the revolution direction. On the surface of the round bar 17, the thin metal layer moves in an oblique direction with respect to its axis, making it possible to reduce irregularities caused by scratches, pinholes, etc. on the surface of the round bar 17.

According to experiments, the diameter of roller 4.4 is 10 mmφ,
Revolution speed 3500-5000 RPM, rotation speed 10
000 to 15000 RPM, a processing speed of 5 to 10 m/mm was obtained for a metal round bar 17 to be polished having a diameter of 2 to 5 mm.

The torque regulator 15 may be a mechanical or electrical torque regulator, such as one that utilizes frictional resistance or an eddy current.

Further, in the above embodiment, three rolls 4, 4 are provided, but any number of rolls 4, 4 may be used as long as there are three or more.

However, if the number of rolls is increased, the effective polishing diameter by the rolls must also be increased, so there is a limit depending on the diameter of the round metal bar to be polished.

In the embodiment described above, one polishing apparatus of the present invention has been described, but two or more such apparatuses may be connected in series.

In addition, the torsion angle of the rolls 4, 4 changes by adjusting the torque regulator, and accordingly, the contact pressure against the surface of the Kinman round bar to be polished changes, and the distance between the support points of the rolls changes. Since the cylindrical ring moves in the axial direction and the friction bed moves accordingly, there is no problem with the automatic drive of the roll.

That is, according to the present invention, three or more rolls are obliquely supported so as to be in pressure contact with the surface of the gold round bar to be polished, and while the rolls are made to revolve, they are also made to rotate in a direction opposite to the direction of revolution. Therefore, on the surface of the metal round bar, metal movement occurs in a diagonal direction with respect to its axis, reducing the unevenness caused by pinholes and scratches on the surface of the metal round bar, and creating a well-polished metal round. It has the effect of giving you a stick.

In addition, since the roll is supported at both ends and the drive system of the support member is connected via a torque regulator, the transmission torque of the torque regulator can be adjusted to adjust the diameter of the round metal bar to be polished. Another effect is that the contact pressure between the roll and the round metal rod to be polished can be set appropriately.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the invention, FIG. 2 is a side view, and FIG. 3 is a system diagram of the drive system. 1... Cylindrical frame, 2... Bearing, 3...
...Cylindrical ring, 4...Roll, 5...
Bearing, 6...Transmission roll, 7...Friction bed, 8...Friction surface, 9...Guide shaft, 1
0... End plate, 11... Guide hole, 12.
...Belt groove, 13...Drive wheel, 14.
...Timing belt, 15...Torque adjuster, 16...Drive device, 17...
Metal round bar, 18...axis line, 19...solid line arrow, 20...spring.

Claims (1)

[Scope of Claims] 1. Three or more polishing rolls are crossed at the center so as to be in pressure contact with the surface of the metal rod to be polished, and both ends of the rolls are rotatably supported at equal intervals by supporting members, and the rolls are The support members at both ends are connected to a drive device so as to rotate around the center line of the metal rod to be polished, and the roll is configured to forcibly rotate in a direction opposite to the rotational direction of the support member. A surface polishing device for metal round bars. 2 Three or more polishing rolls are crossed at the center so as to be in pressure contact with the surface of the metal strip to be polished, and both ends of the rolls are rotatably supported at equal intervals by support members, and the support members at both ends of the rolls are The roll is connected to a drive device so as to rotate about the center line of the metal rod to be polished, and the roll is configured to forcibly rotate in a direction opposite to the rotational direction of the support member,
The apparatus for polishing the surface of a metal bar, wherein the drive devices for the support members at both ends are connected to the same prime mover via a torque regulator.