JPH05176B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for mirror polishing the outer surface of a small diameter cylinder.

[Prior Art] There is a demand for mirror-polished surfaces of small-diameter metal pipe materials used for various purposes, depending on the purpose. Conventionally, when mechanically mirror-polishing the outer surface of such a small-diameter cylinder, no matter what kind of polishing means is used, it is customary to polish each cylinder one by one, which is extremely inefficient. In addition, when polishing the outer surface of a cylinder one by one in this way, it is necessary to relatively move the cylindrical surface and the polishing tool that is in substantially line contact with it so as to polish the entire circumference of the cylindrical surface. Even if you try to automate it, it becomes very complicated.

[Problems to be Solved by the Invention] An object of the present invention is to arrange a large number of small-diameter cylinders in parallel and in a plane, and while rotating the small-diameter cylinders around an axis, To provide a finishing device which performs polishing with a polishing plate that rotates in plane contact with each other, thereby efficiently finishing a large number of small-diameter cylinders to a mirror finish with a flat polishing tool.

[Means for Solving the Problems] In order to achieve the above object, the apparatus for mirror-finishing the outer surface of a small-diameter cylinder of the present invention arranges a large number of small-diameter cylinders to be mirror-finished in parallel and in a plane, and arranges them around the axis thereof. A pallet rotatably accommodated in the pallet, and a large number of small diameter cylinders arranged in a plane on the pallet,
A polishing unit equipped with a mirror-finishing polishing plate that rotates by lightly pressing a viscoelastic abrasive material attached to the surface of a flat part of a disk-shaped tool base, and the above-mentioned pallet and polishing unit are connected in a line along their contact plane. a friction rotation device that makes frictional contact with the small diameter cylinders housed in the pallet and rotates them around an axis at a surface speed faster than the moving speed of the pallet by the moving device; It is constructed by comprising a reciprocating copper device that reciprocates the plate in a direction perpendicular to the direction of relative movement by the moving device within a plane in which small diameter cylinders to be polished are arranged.

[Operation] When polishing and finishing small diameter cylinders, a large number of small diameter cylinders to be mirror polished are housed in a pallet in parallel and planar arrangement, and moved relative to the polishing unit of this pallet, and a friction rotation device is used. While rotating the small-diameter cylinders housed in the above pallet around their axes, the viscoelastic abrasive material on the polishing plate for mirror finishing is rotated while being lightly pressed against the above-mentioned large number of small-diameter cylinders arranged in a plane. .

This makes it possible to efficiently polish a large number of small-diameter cylinders to a mirror finish.In this case, the polishing plate is held in place in order to reciprocate in a direction perpendicular to the direction of relative movement between the pallet and the polishing unit. The abrasive grains act evenly on the entire surface of each small diameter cylinder, making it possible to obtain a highly accurate polished surface.

[Example] Figures 1 to 3 show an example of a mirror finishing device for the outer surface of a small diameter cylinder according to the present invention. A large number of small-diameter cylinders W to be mirror-finished are equipped with a pallet 3 that is transported by a motor (not shown).
can be accommodated in this pallet 3 in a parallel and planar arrangement.

Transfer devices that feed the pallet 3 at a constant speed in the line direction include a roller conveyor, a conveyor using a chain that engages the pallet 3 and moves it at a constant speed, and a conveyor that can move along the guide 2. It is possible to use a transfer device that sequentially pushes the loaded pallets 3 from the insertion end side, or a transfer device of any other configuration.

Further, the pallet 3 has a support frame of a small diameter cylinder W having a rectangular shape as seen in FIG.
With the partition pieces provided within those support frames, adjacent small diameter cylinders W are spaced apart so that they do not come into contact with each other.
Each small diameter cylinder W can be housed so as to be rotatable around its axis.

Below these pallets 3, a friction rotation device 5 is provided which includes an endless belt 6 that comes into frictional contact with the small diameter cylinders W housed in the pallets and rotates them around an axis. This endless belt 6 is driven by a drive device (not shown) at a speed higher than the moving speed of the pallet 3 in the transport direction of the pallet 3 or in the opposite direction, and applies rotational force to the small diameter cylinder W.

The arrangement direction of the small diameter cylinders W in the pallet 3 is not limited to the direction perpendicular to the conveying direction of the pallet 3 as shown in the figure, but can also be oriented in the conveying direction of the pallet 3. In this case, a friction rotation device The endless belt 6 at 5 is necessarily arranged to move in a direction perpendicular to the direction shown, and if necessary it will be moved together with the pallet 3 by a transfer device.

On the other hand, the machine frame 1 is provided with an elevating frame 10 that can be raised and lowered by a screw feeding device 9 driven by the rotation of a handle 8, and a pallet is mounted on a mounting base 11 that is slidably installed on the elevating frame 10. A large number of polishing units 12 supported corresponding to the polishing units 3 are installed.

This polishing unit 12 includes a polishing plate 14 for mirror finish that is rotationally driven via a rotary drive device 13 such as a motor and a speed reduction device provided as necessary, and adjusts the pressing force of the polishing plate 14 against the small diameter cylinder W. In order to do this, the rotary drive machine 13 is attached to the mounting base 11 so as to be able to rise and fall freely, and is suspended from the mounting base 11 by a spring 15.

The polishing plate 14 is constructed by attaching a viscoelastic abrasive material 14b to the flat surface of a disk-shaped tool base 14a attached to the output shaft of the rotary drive machine 13. As this viscoelastic abrasive material 14b,
A sponge-like member such as foamed polyurethane or other synthetic resin foam, or a viscoelastic material such as nylon nonwoven fabric is used. These are selected depending on the finished surface roughness. For example, if the material forming the small diameter cylinder has a hardness comparable to stainless steel, nylon nonwoven fabric is suitable when the finished surface roughness is on the order of 0.1 μm Rmax, and foamed polyurethane is suitable. Suitable for the following finished surface roughness.

In addition, if necessary, the viscoelastic abrasive material 14b
Abrasive grains can be dispersed and retained on the entire surface or inside. In this case, a synthetic resin bond mixed with abrasive grains such as alumina may be used to hold the abrasive grains in a bonded state to a nylon nonwoven fabric, or the free abrasive grains may be held without fixing the abrasive grains. It can also be supported by a network of non-woven fabric.

Since the abrasive grains are supported by a soft material such as the viscoelastic abrasive material 14b, relatively coarse abrasive grains of about 5 to 10 μm can be used. This is relatively rough compared to the finished surface roughness, and is generally about two orders of magnitude larger. Further, the particle size may have a fairly wide distribution.

The polishing units 12 having such a structure are arranged in a necessary number in a direction perpendicular to the direction in which the pallets 3 are fed, and are arranged in multiple layers in the direction in which the pallets 3 are fed. When polishing includes a rough machining step, the abrasive material to be held by the viscoelastic abrasive material 14b is
The roughness can be efficiently improved by arranging them in the line direction in order from the roughest to the roughest, but here, the main purpose is to mirror-polish the small diameter cylindrical surface without giving special consideration to the shape accuracy.

Note that the polishing by the polishing unit 12 is performed by a wet method, and the supply pipe for supplying the polishing liquid such as water to the viscoelastic abrasive material 14b is connected to the polishing unit 12.
It may be provided inside or at any other suitable location. Also,
Electrolytic abrasive composite polishing can also be performed by flowing an electrolytic current with a low current density between the tool base 14a and the small diameter cylinder W while supplying a small amount of electrolyte to the polishing portion. In these cases, instead of or in addition to holding abrasive grains in the viscoelastic abrasive material 14b, a free abrasive stream can be mixed into the polishing liquid or electrolyte.

Mounting stand 11 on which the polishing unit 12 is attached
In order to reciprocate the polishing plate 14 in the polishing unit 12 in a direction perpendicular to the feed of the pallet 3 within the plane in which the small diameter cylinders W to be polished are arranged,
It is connected to a reciprocating device 18 by a connecting rod 17. This reciprocating device 18 includes a slider 21 that slides in the axial direction by the rotation of the screw shaft 20 on a screw shaft 20 that is rotationally driven by a motor 19. 1
It is connected to 1. The reciprocating speed of the mounting base 11 by the reciprocating device 18 is also set to be sufficiently faster than the feeding speed of the pallet 3, for example, about an order of magnitude faster.

In the mirror finishing device having the above configuration,
When polishing and finishing small diameter cylinders W, a large number of small diameter cylinders W to be mirror-finished are arranged in a parallel plane in a pallet 3, and this pallet 3 is moved by a transfer device, and the belt 6 of the friction rotation device 5 is used to While rotating the small diameter cylinders W housed in the pallet 3 around their axes, the rotary drive machine 1
3, the polishing plate 14 for mirror finishing is rotated while being lightly pressed against a large number of small diameter cylinders W arranged in a plane.

As a result, a large number of small-diameter cylinders W are arranged in a plane as a whole and are polished by the viscoelastic abrasive material 14b on the polishing plate 14, so that the small-diameter cylinders can be polished to a mirror finish extremely efficiently. Further, in that case, in order to reciprocate the polishing plate 14 in a direction perpendicular to the conveying direction of the pallet 3, the abrasive grains held by the polishing plate 14 are transferred to the small diameter cylinder W.
It acts uniformly on the entire surface and can obtain a highly accurate polished surface.

Generally, in the case of super finishing, the roughness of the finished surface is 0.1μ
mRmax is said to be the limit, but especially when free abrasive grains are used in the present invention, 0.01μmRmax
We have confirmed that it is possible to polish with high precision.

Note that the present invention is not limited to a configuration in which the pallet 3 is fed in a line in a fixed direction as in the illustrated embodiment, but a configuration in which the polishing unit 12 is moved relative to the pallet 3 that is fixedly arranged. It is also possible to have a similar configuration. Furthermore, instead of the above-mentioned line feeding, the pallet 3 or the polishing unit 12 may be moved back and forth.

[Effects of the Invention] According to the mirror finishing device of the present invention detailed above, a large number of small-diameter cylinders are arranged in parallel and in a plane, and the small-diameter cylinders are rotated around their axis. Since polishing is performed using a polishing plate that rotates in planar contact with the array plane, a large number of small-diameter cylinders can be efficiently mirror-finished using a planar polishing tool.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a mirror finishing apparatus for the outer surface of a small-diameter cylinder according to the present invention, FIG. 2 is a side view of the main part thereof, and FIG. 3 is a sectional view thereof. W...small diameter cylinder, 3... pallet, 5... friction rotating device, 12... polishing unit, 14... polishing plate, 14b... viscoelastic abrasive material, 18... reciprocating device.

Claims (1)

[Scope of Claims] 1. A pallet in which a large number of small diameter cylinders to be mirror-finished are arranged in a parallel and planar manner and rotatably accommodated around their axis, and a large number of small diameter cylinders arranged in a planar manner on the pallet. A polishing unit is equipped with a mirror-finishing polishing plate that rotates with a viscoelastic abrasive lightly applied to the surface of a flat part of a disk-shaped tool base, and the pallet and polishing unit are connected along their contact plane. a transfer device that relatively moves the pallet in the line direction; a friction rotation device that makes frictional contact with the small diameter cylinders housed in the pallet and rotates them around an axis at a surface speed faster than the pallet movement speed by the transfer device; A reciprocating device that reciprocates the polishing plate in a direction orthogonal to the direction of relative movement by the transfer device within a plane in which the small diameter cylinders to be polished are arranged, an outer surface of a small diameter cylinder. mirror finishing equipment.