JPH05318306A - Polishing method for outside face of bar material and its device - Google Patents

Abstract

PURPOSE:To provide a polishing device for the outside face of a bar material in which precision is secured easily and energy conservation can be achieved. CONSTITUTION:A bar material outside face polishing device is provided with a platform 12 for supporting a bar material 10, holding means 14 having a brush 26 on its inside circumference for polishing the outside face of the bar material supported by the supporting platform 12, and being arranged to surround the bar material 10 apparatuses 44, 48 that rotate the holding means 14, and mechanisms 54, 56, 58 that move the holding means 14 and rotating apparatuses 44, 48 along the bar material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for polishing an outer surface of a round bar and an apparatus therefor, and more particularly to a pipe, a solid material or other substantially straight round bar or a curved bar which is rotated by rotating an abrasive tool. The present invention relates to a polishing method and a polishing apparatus for polishing the outer surface of a round bar.

[0002]

2. Description of the Related Art In a polishing apparatus such as a flap wheel disk or a buff disk, an object to be polished is usually rotated and polishing is carried out while a polishing tool is fixed.

[0003]

When the object to be polished has a curved shape such as an elbow, it cannot be polished by the polishing apparatus. When the object to be polished is substantially straight, polishing itself is possible, but when the object to be polished becomes long,
The rotation easily causes shake, which makes it difficult to ensure accuracy. Further, as the weight of the object to be polished increases, the amount of energy consumed to rotate the object to be polished increases.

It is an object of the present invention to provide a method for polishing the outer surface of a round bar by rotating a polishing tool.

Another object of the present invention is to provide an outer surface polishing apparatus for a round bar which can easily ensure accuracy and save energy.

[0006]

In the method for polishing the outer surface of a round bar material according to the present invention, a polishing tool for polishing the outer surface of the round bar material is arranged so as to surround a substantially straight round bar material. Then, while rotating the polishing tool, at least one of the round bar and the polishing tool is moved in the axial direction of the round bar.

The substantially straight outer surface of the round bar can be polished by rotating the polishing tool surrounding the round bar and moving at least one of the round bar and the polishing tool in the axial direction of the round bar. ..

In the method for polishing the outer surface of a round bar according to the present invention, a polishing tool for polishing the outer surface of the round bar is arranged so as to surround a curved round bar, and the polishing tool is rotated while the polishing tool is rotated. Moving the rod in the tangential direction of the axis of the round rod at the center of rotation of the polishing tool.

This makes it possible to polish the outer surface of a curved round bar material such as an elbow.

An outer surface polishing apparatus for a round bar material according to the present invention comprises a table for supporting a substantially straight round bar material, and a polishing tool for polishing an outer surface of the round bar material supported by the support table. And holding means arranged around the round bar,
A device for rotating the holding means, and a mechanism for moving the holding means and the rotating device along the round bar.

After the round bar is supported on the support base, the rotating means rotates the holding means and the moving mechanism moves the holding means and the rotating equipment to polish the outer surface of the round bar in the longitudinal direction.

Since the outer surface of the round bar is polished by rotating the holding means having the polishing tool on the inner circumference, the round bar can be polished in a fixed state. This makes it possible to easily ensure accuracy.

When the polishing tool is a grindstone or a cloth, the shake of the round bar can be suppressed by the polishing tool itself. Therefore, even if the round bar is rotated, the accuracy is improved by suppressing the shake. Can be expected.

The outer surface of the round bar can be polished by rotating and moving the holding means without rotating the round bar, but the holding means should be sufficiently lighter than the round bar. Therefore, energy saving can be achieved.

It is preferable that the holding means is composed of a plurality of holders that can be combined and separated and that these holders are connected in the circumferential direction to form a cylindrical shape.

Due to its nature, the polishing tool is attached to the holding means so as to be in close contact with the outer surface of the round bar. Therefore,
It is troublesome to form the holding means as a cylindrical one piece and insert the round bar into the holding means. However, it is possible to arrange the holding means efficiently by forming the holding means by a plurality of holding tools, arranging them so as to surround the round bar and connecting them in the circumferential direction.

[0017]

EXAMPLE As shown in FIG. 5, in the method for polishing the outer surface of a round bar, a polishing tool 26 for polishing the outer surface of the round bar is placed so as to surround the substantially straight round bar 10. Polishing tool 26
Is attached to the inner circumference of the holding means 14. Polishing tool 26
After disposing, the at least one of the round bar 10 and the polishing tool 26 is moved in the axial direction of the round bar 10 while rotating the polishing tool, and the outer surface of the round bar 10 is polished. Here, “substantially straight” means that the round bar is completely straight, and also includes one having a slightly large radius of curvature even if it is slightly curved.

When the round bar 70 is, for example, an elbow curved by 180 ° as shown in FIGS. 6 and 7, the polishing tool 26 is arranged so as to surround the curved round bar 70. The polishing tool 26 is attached to the inner circumference of the holding means 14. After arranging the polishing tool 26, while rotating the polishing tool 26, the round bar 70 is moved in the tangential direction A of the axis C of the round bar 70 at the rotation center O1 at the center of the thickness D of the polishing tool 26, The outer surface of the rod 70 is polished.

To move the round bar 70 in the tangential direction A, the center of curvature O2 of the round bar 70 is obtained on the rotation plane P including the rotation center O1 of the polishing tool 26, and this is used. That is, the center of curvature
A shaft 72 that rotates around O2 is provided outside the holding member 14, and an arm 74 is attached to the shaft 72. Further, a jig 76 having the same curvature as the round bar 70 is attached to the arm 74,
A round bar 70 is cantilevered by a jig 76, and a shaft 72
To rotate. In this case, the shaft 72, the arm 74 and the jig 76 are dimensioned so as not to interfere with the holding means 14 and other parts,
Determine the shape, etc. A robot known per se can be used to move the round bar 70 in the tangential direction A, and when the round bar 70 is a 90 ° elbow, as shown in FIG.
And in a manner similar to that shown in FIG.

As shown in FIG. 1, the outer surface polishing apparatus for a round bar has a base 12 for supporting the round bar 10, a holding means 14, and a holding means 14.
The rotating device 16 and the moving mechanism 18 are included.

Although the round bar member 10 is a pipe in the illustrated embodiment, it may be a solid member.

The support base 12 comprises a base portion 20 and a pair of support portions 21 which are spaced apart from each other. The support portion 21 is provided with a hole 22 through which the round bar material 10 can penetrate loosely, and a chuck 24 is attached coaxially with the hole 22. In the illustrated embodiment,
The chuck 24 is a fixed type and supports the round bar member 10 in a fixed state.

As shown in detail in FIG. 2, the holding means 14 has a substantially cylindrical shape, and an inner peripheral surface of the holding means 14 polishes the outer surface of the round bar 10 supported by the support 12. Has 26.

In the illustrated embodiment, the retaining means 14 comprises eight retainers 28 of the same shape which can be joined and separated. As shown in FIGS. 3 and 4, the holder 28 has a protrusion 29 at one end in the circumferential direction and a notch 30 at the other end. The protrusion 29 is shown in FIGS.
As will be apparent, it occupies a portion of the width of the retainer 28 and fits snugly in the notch 30 of another retainer 28 that is circumferentially adjacent. By connecting these holders 28 in the circumferential direction, the cylindrical holding means 14 is obtained.
The holding means 14 can be formed by a plurality of holders 28.

The protrusion 29 of the holder 28 has a bolt hole 31 extending in the axial direction, and the portion of the holder 29 provided with the notch 30 is aligned with the bolt hole 31 and extends in the axial direction. 32. Bolt 34 to bolt hole 31
From the holder 28 through the bolt hole 32,
The protruding portion is screwed into the rotor of the rotating device 16 described later, and the holder 28 is attached to the rotating device.

The polishing tool 26 is a brush in the illustrated embodiment, and is embedded in a rectangular block 36. On the other hand, the holder 28 has a groove 38 on the inner circumference. Block 36
Is fitted into the groove 38, and a screw is screwed into the screw hole 40 provided on the side surface of the holder 28 to abut against the side surface of the block 36, and the block 36 is pressed against the groove surface of the groove 38 to be fixed. As the polishing tool 26, a brush, a grindstone, a polishing cloth, or the like suitable for the purpose of use is selected.

As shown in FIG. 5, the rotating device 16 includes a motor 44, a pulley 46 attached to its output shaft, and a rotor 48. The rotors 48 each have a cylindrical shape,
The connecting portion 49, the pulley portion 50, and the bearing portion 51 are integrally provided. The inner diameter of the rotor 48 is larger than the outer diameter of the round bar 10. The bearing 51 is rotatably supported by a slider 54 via a bearing (not shown), the motor 44 is attached to the slider 54, the belt 52 is stretched over the pulley 46 and the pulley 50, and the holding means 14 is connected. Bind to 49.

The moving mechanism 18 includes a slider 54, a screw rod 56, and a servomotor 58. Slider 5
4 is mounted on a shoulder portion of the base portion 20 of the support base 12 and is movably supported, and a screw rod 56 extends through the slider 54. The screw rod 56 and the slider 54 are ball screw-coupled to each other, which is known per se.
When 6 rotates, the slider 54 moves in the arrow direction A. The output shaft of the servo motor 58 is connected to the screw rod 56.

Prior to connecting the holding means 14 to the rotor of the rotating device 16, the round bar 10 is passed through a hole 22 formed in one supporting portion 21 of the supporting base 12, and further from the rotor 48 to the other supporting portion 21. Through the hole 22 provided in the chuck 24
Fix with. Then, the plurality of holders 28 of the holding means 14
Are connected to the connecting portion 49 of the rotor 48 by the bolts 34.

While the motor 44 is driven to rotate the belt 52 in the B direction (FIG. 5), the servo motor 58 is driven to move the slider 54 in one direction of the A direction. When the slider 54 moves, the holding means 14 and the rotating device 16 move together with the slider 54 and move along the round bar 10 to polish the outer surface of the round bar 10.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an outer surface polishing apparatus for a round bar according to the present invention.

FIG. 2 is an enlarged perspective view of a holding unit shown in FIG.

FIG. 3 is a perspective view showing one holder of the holding means shown in FIG.

FIG. 4 is a side view of the holder shown in FIG.

5 is an enlarged perspective view showing the holding means and the rotating device shown in FIG. 1. FIG.

FIG. 6 is a perspective view showing a method for polishing the outer surface of a round bar according to the present invention, wherein the round bar is a 180 ° elbow.

FIG. 7 is a schematic view of the outer surface polishing method shown in FIG.

[Explanation of symbols]

 10, 70 Round bar material 12 Supporting base 14 Holding means 16 Rotating equipment 18 Moving mechanism 26 Polishing tool 28 Holding tool

Claims (4)

[Claims] 1. A polishing tool for polishing the outer surface of a round bar is arranged so as to surround a substantially straight round bar, and at least the round bar and the polishing tool are rotated while rotating the polishing tool. A method for polishing an outer surface of a round bar, which comprises moving one of them in an axial direction of the round bar. 2. A polishing tool for polishing the outer surface of a round bar is arranged so as to surround a curved round bar, and while the polishing tool is rotated, the round bar is rotated at the center of rotation of the polishing tool. A method for polishing an outer surface of a round bar material, which comprises moving the material in a tangential direction of an axis line of the material. 3. A round bar member having a table for supporting a substantially straight round bar member, and a polishing tool for polishing an outer surface of the round bar member supported by the supporting table on an inner circumference, arranged around the round bar member. An outer surface polishing apparatus for a round bar material, comprising: a holding means, a device for rotating the holding means, and a mechanism for moving the holding means and the rotating device along the round bar material. 4. The round bar member according to claim 1, wherein the holding means is composed of a plurality of holders that can be combined and separated, and the holders are connected to each other in the circumferential direction to form a cylindrical shape. External polishing device.