JPH0637891Y2 - Polishing roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention relates to a polishing roll for polishing a wide work material such as a rubber belt.

"Prior art" As a means for polishing wide work materials such as rubber belts, conventionally, a polishing roll formed by forming an abrasive grain layer by electrodepositing diamond or CBN on the outer peripheral surface of a metal cylinder has been used. Recently, in response to the demand for wider work material, polishing rolls of this kind also tend to become longer.

However, if the cylindrical body is too long, a large plating bath is required for electrodeposition of the superabrasive grains, and the manufacturing cost is extra.Therefore, when a particularly long polishing roll is required, the cylindrical body is required. Is divided into two parts from the center, and these are separately electrodeposited, and then integrated again.

FIG. 5 shows an example of such a polishing roll.
The polishing roll 1 is composed of a pair of cylindrical bodies 1A, 1B having an abrasive grain layer 2 electrodeposited on the outer peripheral surface thereof.
Is used by being integrated by inserting an inner cylinder (not shown) having a cooling water passage therein.

"Problems to be solved by the invention" By the way, by using the split type polishing roll 1 as described above,
As in the case of the integrated polishing roll, when the work material is polished by pressing it against the work material while simply rotating it, the edge 3 of the roll dividing surface always hits a fixed part of the work material, so the polished surface of the work material Had a problem that streaks were formed in the longitudinal direction.

Therefore, for the purpose of solving this problem, usually, as shown in FIG. 5, the polishing roll 1 is reciprocated in the axial direction at the same time as the rotation so that the edge 3 of the roll division surface in the contact surface with the work material W is The position of is gradually changed to prevent streaking.

However, even if the polishing roll 1 is reciprocated in this way, it is inevitable that a slight scratch will still be generated at the position where the edge 3 of the dividing surface hits at both end positions a and b at which the reciprocating motion stops momentarily. However, there is a drawback that it cannot be used for a work material that dislikes streaks of this kind.

Further, in the conventional polishing roll 1, as the work material W becomes wider, the work material W is more likely to be loosened or wrinkled during polishing. There was a problem that it could not be used as a product.

[Means for Solving the Problems] The present invention has been made to solve the above problems, and a pair of cylinders is formed by dividing a cylindrical substrate at a central portion in the longitudinal direction from a position perpendicular to the axis to a divided surface. It is characterized in that it can be divided into bodies, and spiral grooves in opposite directions are respectively formed on the outer peripheral surfaces of these cylindrical bodies and superabrasive grains are electrodeposited.

[Operation] To use this polishing roll, the polishing roll is rotated about the axis and simultaneously swung in the direction of the axis to be applied to the work material. Then,
Since the roll dividing surface is inclined from the position perpendicular to the axis, the edge of this dividing surface swings left and right as the roll rotates at both end positions of the reciprocating motion, and is not constant. It does not cause trouble such as deep shaving to form streaks.

Further, since spiral grooves that are opposite to each other from the roll dividing surface are formed on the outer peripheral surface of the polishing roll, the grooves are rotated in the direction in which the spiral progresses from the dividing surface side of the polishing roll to the outside. By doing so, a frictional force that spreads the work material from the center to both sides is generated, and wrinkles and slack are prevented from occurring in the work material being polished.

"Embodiment" FIG. 1 is a plan view showing an embodiment of a polishing roll according to the present invention.

This polishing roll is a metal cylinder (for example, 250mmφ × 950m
m) is a dividing surface 11 inclined from a position orthogonal to the axis.
Each of the pair of cylindrical bodies 10A, 10B having the same size, which are divided by, is provided with a groove 12A, 12B having a spiral shape opposite to each other.
Alternatively, the abrasive grain layer 13 is formed by forming a plurality of strips (four strips in this case) and then electrodepositing superabrasive grains such as diamond or CBN over the entire surface. An annular plate portion 14 is formed at each end of the cylindrical bodies 10A and 10B on the side opposite to the dividing surface 11.

The pitch and depth of the grooves 12A and 12B are common, and the width thereof is the groove 1
The protrusions 15A and 15B formed between 2A and 12B are made substantially equal (for example, the width of the groove is about 10 mm and the depth is about several mm). Further, both sides of the convex portions 15A, 15B are chamfered in an arc shape, and the convex portions 15A, 15B of each cylindrical body are set to be out of phase with each other on the dividing surface 11.

It is desirable that the dividing surface 11 has an inclination angle of 2 to 5 °. If it is less than 2 °, the conventional problem cannot be solved, and if it is more than 5 °, it becomes difficult to process the spiral groove.
At the time of electrodeposition, the current densities on the surfaces of the cylindrical bodies 10A and 10B become non-uniform, making it difficult to electrodeposit uniformly over the entire surface. The edges of the divided surface 11 are slightly chamfered.

When the polishing roll 10 is used, as shown in FIG. 3, first separate the cylindrical bodies 10A and 10B and then insert the inner cylinder 20 inside.
Insert. The inner cylinder 20 has a triple structure in which a central shaft 21, a first cylindrical body 22 and a second cylindrical body 23 are coaxially arranged, and both ends of the second cylindrical body 23 are discs 24 at both ends of the central shaft 21. And a disk 25 is provided between each end of the first tubular body 22 and the central shaft 21. And the first cylinder 22 and the second cylinder
Two partition plates 26 are spirally fixed between the two spaces 23, thereby forming a pair of spiral cooling water passages 27 communicating with both ends of the central axis. Then, on the outer peripheral surface of the second cylindrical body 23,
With the inner surfaces of 10A and 10B supported, the disk 24 and polishing roll 1
Each annular plate part 14 of 0 is fixed with bolts, and both cylinders 10A, 10B
Are integrated.

In order to perform polishing, the polishing roll 10 mounted on the inner cylinder 20 as described above is brought into contact with the work material W while reciprocating in the axial direction while rotating around the axis, and at the same time, is orthogonal to the polishing roll 10. The work material W is fed in a predetermined direction at a constant speed. Then, as shown in FIG. 4, since the roll dividing surface 11 is inclined, the edge of the dividing surface 11 swings left and right with rotation at both end positions P1 and P2 of the reciprocating motion and is not constant. There is no problem such as deeply shaving one place or leaving a non-cut portion to form a streak, and a perfect smooth surface without a streak can be easily obtained.

Further, since the spiral grooves 12A and 12B which are opposite to each other are formed on the outer peripheral surface of the polishing roll 10, by rotating the polishing roll 10 so that the advancing direction of the spiral goes outward from the split surface 11 side. Improves the ability to discharge abrasive powder to both sides, and also generates a frictional force that spreads the work material W from the center to both sides to prevent wrinkles and slack from occurring in the work material W during polishing, and the resulting polishing It is possible to prevent the occurrence of unevenness.

The polishing roll of the present invention is not limited to the above embodiment,
You may change suitably about the structure for integration. Further, although the roll dividing surface 11 is a simple flat surface in the above embodiment, it may be a curved surface or a refracting surface instead.

[Advantage of Invention] As described above, in the polishing roll according to the present invention, since the roll dividing surface is inclined, the polishing roll rotates about the axis and reciprocates in the axis to come into contact with the work material. By doing so, the edge of the dividing surface oscillates left and right even at both ends of the reciprocating motion and is not constant, so that there is a problem in that the edge deeply cuts one place, or left uncut and forms a scratch. It does not occur, and it is possible to obtain a perfect smooth surface.

Further, since spiral grooves having opposite directions are formed on the outer peripheral surface of the polishing roll, by rotating the polishing roll so that the advancing direction of the spiral goes from the dividing surface side to the outer side, it is possible to remove the polishing powder. It is possible to prevent the occurrence of wrinkles and slack in the work material being polished, and to prevent the occurrence of uneven polishing due to the friction force that spreads the work material from the center to both sides.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a polishing roll according to the present invention, FIG. 2 is an enlarged cross-sectional view of a divided surface of the polishing roll, FIG. 3 is a vertical cross-sectional view showing its usage, and FIG. FIG. 4 is an explanatory view of the effect of the present invention. On the other hand, FIG. 5 is an explanatory view showing the problems of the conventional polishing roll. 10 ... Polishing roll, 10A, 10B ... Cylindrical body, 11 ... Dividing surface, 12A, 12B ... Spiral groove, 13 ... Electrodeposited abrasive grain layer, 15A, 15B
...... Convex part, 20 ...... Inner cylinder, P1, P2 ...... Reciprocating both end positions,
W: Work material.

Claims (1)

[Scope of utility model registration request] 1. A cylindrical substrate can be divided into a pair of cylindrical bodies at a dividing surface inclined from a position perpendicular to an axis at a central portion in a longitudinal direction thereof, and spirals of opposite directions are provided on outer peripheral surfaces of these cylindrical bodies. A polishing roll, characterized in that each of the grooves is formed and superabrasive grains are electrodeposited.