JPH05337820A - Method of mirror-surface finishing outer surface of roller - Google Patents

Abstract

PURPOSE:To enhance the surface roughness and hardness of the outer surface of a roller formed of an aluminum pipe or the like in a method in which the outer surface of the roller is mirror-surface finished, by subjecting the outer surface of the roller to a burnishing process with the use of a burnishing roller after it is polished by a centerless polishing machine. CONSTITUTION:In the case of mirror-surface finishing the outer surface of a workpiece such as a roller formed of an aluminum pipe, the workpiece 1 is set on a centerless polishing machine composed of a grinding wheel 2 and a regulating wheel 2 whose outer peripheral surface is slightly tapered in a direction in which the workpiece 1 is conveyed. That is, the workpiece 1 is set on a support bed 4, and is pressed against the outer surface of the grind wheel 2 under a specified pressure while the grind wheel 2 is rotated at a specified rotational speed so that the outer surface of the workpiece 1 is polished while the workpiece 1 is advanced. Then, the workpiece 1 is led through the inside of a burnishing roller body 6 in which a plurality of needle- like rollers slightly tapered in the conveying direction are arranged along the circumferential direction thereof, and accordingly, the outer peripheral surface of the workpiece 1 is burnished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mirror-finishing the outer surface of a roller, and more particularly to a method for facilitating the mirror-finishing of the outer surface of a roller used in a roller device for guiding recording paper such as electronic equipment and copying machines. Regarding

[0002]

2. Description of the Related Art Conventionally, a roller such as an aluminum pipe has been used for a sleeve containing a non-magnetic material magnet, which is used in a developing device of a copying machine or the like, and the outer surface of this kind of aluminum pipe is mirror-finished by a lathe. It is processed and then blasted.

[0003]

However, in the conventional processing method, it takes skill to perform mirror finishing using a precision lathe machine dedicated to polishing the outer surface of the pipe-shaped roller, and the number of processing steps increases. Therefore, there is a problem that the work is troublesome and the cost is high.

The present invention has been made in view of the above conventional problems, and the outer surface of the pipe-shaped roller is polished by a centerless polishing machine in the first step, and the second step is performed.
It is an object of the present invention to provide a method for mirror-finishing the outer surface of a roller, which facilitates mirror-finishing the outer surface of the roller by performing burnishing in the process.

[0005]

In order to achieve the above object, according to the present invention, the outer surface of the roller such as an aluminum pipe is mirror-finished by a centerless polishing machine in the first step. And then burnishing with a burnishing roller in the second step.

[0006]

With the above-described structure, in the present invention, when the outer surface of the pipe-shaped roller is mirror-finished, first,
By polishing the outer surface of the roller with a centerless polishing machine in the step and subsequently performing burnishing with the burnishing roller in the second step, it is possible to enhance the surface roughness and hardness of the outer surface of the roller. Although the number of processing steps will increase, automation of processing will become easier with the use of a general-purpose machine.
The processing cost can be reduced, and the surface roughness and hardness of the outer surface of the roller can be improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a processing state by a centerless polishing machine according to the present invention, FIG. 2 is a front view of FIG. 1, and FIG.
Is a front view of the burnishing roller according to the present invention, and FIG.
4 is a sectional view taken along line 4-4 of FIG.

In the centerless polishing machine of FIGS. 1 and 2, 1 is a workpiece such as a roller formed of an aluminum pipe, 2 is a grinding wheel, 3 is an adjusting wheel, and 4 is a support base. Several types of the grinding wheels 2 are prepared so that they can be replaced according to the workpiece, and the rotation speed can be set appropriately depending on the material of the workpiece 1. Further, the outer peripheral surface of the adjusting wheel 3 is formed in a truncated cone shape having a slight taper in the conveyance direction of the workpiece 1, and the workpiece 1 placed on the support 4 is ground by the grinding wheel 2 While pressing with a predetermined pressing force on the surface of
By rotating at a predetermined rotation speed, the workpiece 1 on the support base 4 can be conveyed in a forward direction at a predetermined speed.

On the other hand, the workpiece 1 such as a roller whose outer surface is polished by the centerless polishing machine is burnished in the second step in order to further improve the surface roughness and hardness of the outer surface. It is something. As shown in the enlarged sectional views of FIGS. 3 and 4, the burnishing roller 5 for burnishing has a plurality of needle rollers (for example, 12 needle rollers in the embodiment) on the inner diameter side of the burnishing roller body 6. 7
Are arranged at equal intervals.

The needle roller 7 is formed so as to have a slight taper in the conveying direction of the workpiece 1, and the inner peripheral portion formed by the plurality of needle rollers 7 is formed on the workpiece 1.
The outer peripheral surface of the workpiece 1 is subjected to burnishing in the process of passing the outer periphery of the workpiece.

Here, the number, length, material, hardness, surface roughness and taper amount of the needle rollers 7 constituting the burnishing roller 5, the number of revolutions of the burnishing roller 5 and the like are as follows.
It can be set to an appropriate value according to burnishing processing such as surface roughness and hardness applied to the outer surface of the workpiece 1.

Therefore, when the outer surface of the workpiece 1 such as a roller is mirror-finished by the centerless polishing machine and the burnishing roller configured as described above, in the first step, the centerless polishing machine is used Polish the surface,
Subsequently, burnishing is performed by a burnishing roller in the second step, whereby the surface roughness and hardness of the outer surface of the roller can be enhanced.

[0014]

As described in detail above, according to the processing method of the present invention, the outer surface of the roller is polished by the centerless polishing machine in the first step, and then burnished by the burnishing roller in the second step. By applying, it is possible to enhance the surface roughness and hardness of the outer surface of the roller, and the use of a general-purpose machine facilitates automation of processing,
The processing cost can be reduced, and the surface roughness and hardness of the outer surface of the roller can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a processing state by a centerless polishing machine according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an enlarged sectional view showing the front of the burnishing roller according to the present invention.

4 is a sectional view taken along line 4-4 of FIG.

[Explanation of symbols]

 1 Workpiece 2 Grinding wheel 3 Adjusting wheel 4 Support stand

Claims (1)

[Claims] 1. A mirror outer surface of an aluminum pipe or the like, wherein the outer surface of the roller is polished by a centerless polishing machine in a first step, and subsequently burnished by a burnishing roller in a second step. A method for mirror-finishing the outer surface of a roller characterized by: