JPH01135458A - Belt type polishing device - Google Patents

Abstract

PURPOSE:To uniformly polishing-work a polished surface in flat plane form always in a constant surface contact state by installing a means which forms a polishing surface part in flat surface form between the free pulleys arranged at the part where a polishing belt is pressed ontothe polished article and maintains the polishing surface part in flat surface state even in the polishing work. CONSTITUTION:When the bottom part of a polished article is polished, the polishing surface part 2b in flat surface form of a polishing belt 2 formed between free pulleys 3b and 3a is pressed onto the bottom part of the polished article. In this state, a driving pulley is revolved by the drive of a motor, and the polishing belt 2 laid between the driving pulley and the free pulleys 3a-3d is traveled on a prescribed path, and the bottom part of the polished article is polishing-worked by the polishing surface part 2b. In this case, even if a certain degree of unevenness exists on the bottom surface, a flat plate (a kind of flat plane keeping means) 15b presses the polishing surface part 2a onto the bottom surface part by the urging force of a spring 17, and the polished surface 2a is always kept in a flat surface state, and the bottom part of the polished article is uniformly polished in a constant surface contact state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a belt-type polishing device, and is particularly applicable to a polished object whose polished surface is composed of a plurality of flat surfaces.
This invention relates to a Bell 1-type polishing device that is capable of polishing in a state of surface contact.

[Conventional technology] FIG. 8 is a perspective view showing a conventional belt type polishing device.

In the figure, (1) is a polished object such as a mold, which has a concave polished surface consisting of a side surface (1a), a corner portion (1b), and a bottom surface (1C). . (2) is an annular polishing belt having a polishing surface on which abrasive grains are laid;
) is a floating pulley installed at the tip of this device, and (4) is a support rod that rotatably supports the floating pulley (3).

(5) is a spring that biases the support rod (4) in the direction of the floating pulley (3), giving appropriate tension to the polishing belt (2). (6) is a fixing member that fixes the floating pulley (3) and support rod (4) etc. to the main body of the device, (7) is a drive pulley that rotationally drives the polishing bell 1-(2>), and (8) is a polishing member. An air motor is the driving source for the bells 1 to (2) and the drive pulley (7), (9) is a handle for the operator to support this device by hand, and (10) is an air motor for the motor (8). Must be supplied with an air hose.

A conventional belt-type polishing device is constructed as described above, in which a polishing belt (2) having a polishing surface covered with abrasive grains is stretched between a drive pulley (7) and an idler pulley (3). The polishing bells 1 to (2) are driven to rotate and are pressed against the object to be polished (1) to perform polishing. Since this polishing belt (2) has an endless ring shape, it is possible to continuously polish the object to be polished (1).

The operation of this Bell 1-type polishing apparatus will be explained below.

The air pressure from the air hose (10) is usually 1,
C) ~7. Air of about O [Kg/CIrt] is supplied to the motor (8), and the motor (8)
000 [ROM] high speed rotation. At the same time, the drive pulley (7) also rotates at the same speed. The polishing bells 1 to (2) stretched between the drive pulley (7) and the idler pulley (3) rotate in a predetermined orbit. The driving speed of this polishing belt (2) is approximately 2,500 [m/min], and during the i6° polishing process, the operator holds the handle (9) with his/her hand, and then moves the drive located at the tip of the idler pulley (3). The polishing belt I-(2> in this state is pressed against the surface to be polished of the object to be polished (1).
The polishing surface coated with abrasive grains polishes the object to be polished (1).

Then, the contact part with this object to be polished (1) is connected to the object to be polished (1).
From the side part (1a) of 1) to the corner part (1b),
The entire object to be polished (1) is polished by sequentially moving toward the bottom surface (1C).

In particular, this type of belt-type polishing device is used when polishing an object (1) to be polished, such as a mold, which has a concave polished surface.

However, the object to be polished (1) does not necessarily have a concave surface to be polished, and there are various shapes and sizes, and therefore, many belt-type polishing devices have been invented for each purpose. For example, Japanese Utility Model Application Publication No. 1856/1983, Japanese Patent Application Publication No. 61/1988
This technique is disclosed in Japanese Patent Application Laid-Open No. 59-134648, etc.

[Problems to be Solved by the Invention] In the conventional belt-type polishing device as described above, one floating pulley (3) is arranged at the tip, and the polishing belt (2) is hung on this floating pulley (3). The object to be polished (1) is pressed against the object (1) for polishing.

At this time, the polishing belt (2) is in line contact with the object to be polished (1), and its tip is easily affected by vibrations, etc.
For example, when this type of belt-type polishing device is installed on a machine robot, etc., wave-shaped undulations occur on the polished surface of the object to be polished (1), and polishing is performed in this state, causing problems with the finish. was there. For example, there have been problems in that excessive polishing may occur locally at the tip, or that the surface to be polished is not uniform throughout.

Furthermore, in conventional belt-type polishing devices, the contact area with the object to be polished (1) is limited, so depending on the shape of the object to be polished (1), the polishing process may be forced to be performed in a quite unreasonable posture. was there.

Therefore, this invention was made to solve these problems, and provides a belt that can perform uniform polishing on a flat surface to be polished, and can arbitrarily select the positional relationship with the object to be polished during polishing. The objective is to obtain a type polishing device.

[Means for Solving the Problems] A belt-type polishing device according to the present invention includes an annular polishing belt (2) having a polishing surface on which abrasive grains are laid, and the annular polishing belt (2) being stretched. A driving pulley (7) and a plurality of floating pulleys (3a).

(3b), (3c), (3d) and a plurality of planar rA polished surface portions (2a) formed between the plurality of floating pulleys (3a>, (3b), (3c), (3d) , (2b),
(2c), the plurality of planar polished surface portions (2a), (
2b) and (2c) are flatness maintaining means capable of maintaining a flat state during polishing.

[Function] In the belt type polishing device of the present invention, the polishing bell 1-(2>) having the polishing surface on which abrasive grains are laid is used as the object to be polished (1).
A plurality of floating pulleys (3a>, (3
b), (3c), and (3d>) are appropriately arranged to form a plurality of floating pulleys (3a).

A plurality of planar polished surface portions (2a>, (2b), (2c) are formed between (3b), (3c), and (3d), and the plurality of planar polished surface portions (2ad, (2b), (2G> maintains a flat state by a flat surface maintaining means during polishing. Therefore, a plurality of flat polished surface parts (2a>
, (2b).

(2C) can be polished in surface contact with a flat surface to be polished, and can be polished uniformly. In addition, the polished surface portion (2a>, (
2b) and (2c), the ω1 polished body (
Depending on the shape of the surface to be polished (1), the arrangement relationship between the object to be polished (1) and the belt-type polishing device during polishing can be changed as appropriate.

[Example] Fig. 1 is a perspective view showing a belt-type polishing device which is an embodiment of the present invention, Fig. 2 is an enlarged front view showing the tip of the belt-type grinding device shown in Fig. FIG. 2 is an enlarged perspective view of the main part of the belt-type polishing device shown in FIG. 1; FIG. In addition,
In the figure, (1) to (8) are the same or equivalent components of the conventional example.

In the figure, (3a>, (3b), (3C).

(3d) shows four floating pulleys arranged at the four corners of the square. These four floating pulleys (3a).

Planar polished surface portions (2a), (2b), and (2c) are formed between (3b), (3c), and (3d), respectively. In addition, (11) shows that this belt-type polishing device can be used by a machine robot (
(12) is the arm of the robot. (13) represents each polishing surface part (of the polishing bell h (2>)
2a>, (2b), and (2G>), and each polishing surface part (2a>, (2G)
b).

(2C) is required at the joint part of the plane maintaining means that keeps the plane in a plane state. (14) represents each floating boob 9 (3a>, (3b), (3c)
), (3d> and support '7L that connects and rotatably supports
/-mu, (15a>, (15b).

(15G> is each floating pulley (3a>, (3b)).

The flat plates (16) are respectively disposed between (3c) and (3d), and the flat plates (16) are vertically disposed in the center of the flat plates (15a>, (15b>, (15c)).

(15G) is a support shaft that moves integrally with (15G). (17) is a support shaft that is arranged around the support @ (16).
for each ω11 part (2a), (2b>).

It is pressed in the (2C) direction. (18) is a hollow bolt whose inside is hollow and the support shaft (16) is slidably inserted therein, and (19) is a hollow bolt that is screwed into the hollow poles 1 to (18) and is connected to the spring (17). Nut for adjusting elastic force (20
) is covered by a washer which is one contact surface of the spring (17).

The bell 1-type polishing apparatus of this embodiment is constructed as described above, and the polishing bells 1-(2> have a drive pulley (7) and four floating pulleys (3a>, (3b>).

(3c) and (3d>), and rotates along the orbit determined by them.

Here, the polishing operation of the object to be polished (1) according to this embodiment will be explained. The operation of supplying air to the motor (8), the rotational speed of the motor (8) and drive pulley (7), the drive speed of the polishing bells 1 to 2, etc. are the same as in the conventional example, so the explanation will be given below. Omitted.

First, when polishing the side surface (1a) of the object to be polished (1), the polished surface (2a) of the ftJI@belt (2) formed between the floating pulley (3a) and the floating pulley (3b) is polished. , by pressing against the side surface (1a) of the object to be polished (1). Even if the side surface (1a) has some unevenness, the polished surface (2a) is pressed against the side surface (1a) by the force of the flat plate (15a) or the spring (17). The polished surface portion (2a) is not deformed by bending or the like and is always maintained in a flat state. Therefore,
The polished surface portion (2a) and the side surface portion (1a) are always in surface contact.

Next, as shown in Fig. 2, the bottom part (1) of the N1 polished body (1) is
When polishing C), the polishing surface portion (2b) of the polishing bell 1-(2> formed between the floating pulley (3b) and the floating pulley (3C) is pressed against the bottom surface portion (1C). , is performed in the same manner as the polishing of the side surface portion (1a).

In addition, when polishing the side surface (1d) opposite to the side surface (1a), the polishing surface portion (2C) of the polishing bells 1 to (2)
Bring them into surface contact and do the same as above.

Furthermore, when polishing a part of the corner (1b) of the object to be polished (1), the floating pulley (3b) can be pressed to perform ωl polishing.

As described above, in the belt-type polishing apparatus of this embodiment, the flat surface to be polished and the polishing surface portion (2a>
, (2b), and (2c) can be polished while always maintaining a surface contact state with a constant and stable pressing force. Therefore, there is no need for local excessive polishing, which is the case with conventional devices, and the flat surface of the polished surface can be finished uniformly. Therefore, it can be attached to a machine robot or the like and used for automatic polishing.

In addition, the contact surface of the polishing belt (2) is adjusted according to each polished surface of the side part (1a), corner part (1b), bottom part (1G>, and side part (1d)) of the object to be polished (1). Polished surface portions (2a>, (2b)).

(2C) can be selected as appropriate, and the polishing process can be performed in an arrangement and posture that facilitate the polishing process.

Note that in the belt-type polishing device of this embodiment, a flat plate (15
a>, (15b), (15C) is the same as that of rat (1
Adjustment can be made by changing the position of 9) and changing the elastic force of the spring 17). Also, this spring (1
7) can also absorb vibrations caused by the rotational drive of the polishing belt (2), so extremely stable polishing can be performed.

Next, other embodiments of the invention will be described.

In the above embodiment, a plurality of planar polished surface parts (2a>, (
2b) and (2c), a plurality of floating pulleys (3a
>, (3b), (3c).

(3d) A flat plate between (15a>, (15b), (15c)
are arranged respectively, and each of these flat plates (15a>.

A support shaft (16) is installed vertically in the center of (15b) and (15c), and a flat plate (
15a>, (15b), and (15c) on each polished surface part (2a
A description has been given of an arrangement in which the springs (17) are pressed in the directions of >, (2b), and (2c). However, it is also possible to use other flatness maintenance means.

FIG. 4 is a perspective view showing a belt-type polishing device according to another embodiment of the present invention, FIG. 5 is an enlarged perspective view of main parts showing the tip of the bell 1-type polishing device shown in FIG. 4, and FIG. FIG. 7 is a perspective view showing a belt-type polishing device according to still another embodiment of the present invention.
The figure is an enlarged front view of the principal part showing the tip of the belt-type polishing device of FIG. 6.

In addition, in the figure, (1) to (8), (11) to (14>
, and (16) are constituent parts that are the same as or correspond to the constituent parts of the above embodiment.

In FIGS. 4 and 5, (21) is an auxiliary roller appropriately arranged between four floating pulleys (3a>, (3b), (3c), and (3d), and each floating pulley (3a> , (3b
), (3c), (3d) together with the support frame (14)
The polishing surface portions (2a>, (2b)
, (2c) in flush contact with the back surface of each polished surface part (2a
).

The plane states of (2b) and (2c) are maintained.

Also, in FIGS. 6 and 7, (22a).

(22b>, (22c) are four floating pulleys (3a),
(3b), (3c), (3d>) Each 1i1: crotched magnet, and this magnet E(22a>, (22b), (22c
) and the object to be polished (1), there are polished surface parts (2a>, (2b
) and (2c) are held in a flat state. (2
3) is a magnetic body located at both ends of each magnet (22a>, (22b), (22c), and (24) is a magnetic body located at both ends of each magnet (22a>, (22b), (22c).
22b), (22c) and a non-magnetic material interposed between the magnetic material (23), (25) is a magnet (22a>, (22b),
(22C), the magnetic body (23), and the object to be polished (1). (26> is a long hole drilled in the coupling shaft (13), (27) is a magnet (22a>, (22b),
The support shaft (16) vertically installed on (22c) is the coupling shaft (13)
It is a set screw that prevents it from falling off. Support shaft (16)
is inserted into an insertion hole drilled in the coupling 1fIiIl (13), and must be able to move by the length of the elongated hole (26).

The operation of each of the above embodiments will be explained below.

First, an embodiment using a plurality of auxiliary rollers (21) shown in FIGS. 4 and 5 will be described.

The surface to be polished before polishing of the object to be polished U1 (1) is usually an uneven surface as shown in FIG. Therefore, the polished surface part (2a), (
2b), (2c)! If there is no holding means, the surface will be deformed due to the influence of the unevenness, and it will not be possible to maintain the flat state. For this reason, the floating pulley (3a>, (
Only the portions 3b), (3c), and (3d>) were strongly polished, making it difficult to polish uniformly. However, as in this example, each floating pulley (3a>, (3b),
(3c).

(3d) By disposing a large number of auxiliary rollers (21) between each polishing surface portion (2a>, (2b)).

(2C) comes into contact with the surface to be polished almost evenly, and smooth 01 polishing can be performed as a whole. Finally, complete surface contact is achieved, and a uniformly polished surface can be achieved.

In this embodiment, a rotatable auxiliary roller (21)
In particular, the resistance during polishing of the polishing belt (2) is greatly reduced. Therefore, the rotational drive of the polishing belt (2) can always be performed smoothly.

Next, the magnets (22a) and (2
An example using 2b) and (22c) will be described.

The belt-type polishing apparatus of this embodiment can be particularly used for polishing a metal object (1) to be polished, such as a mold. That is, a magnetic path (25) is formed passing through the 1a stones (22a), (22b), (22c), the object to be polished (1), and the magnetic material (23), and the magnets (22a>, (22b), (22c) ) and the object to be polished (1). Then, the polishing surface portions (2a>, (2b), (2) of the polishing bells 1 to (2)
c) is a magnet (22a>, (22b), (22c),!:
A state of clamping pressure is created between the polishing target (1) and the polishing target (1). For this reason, r
ut Fi surface part (2a>, (2b), (2G> is strong tt
The polished surface of the object (1) to be polished can be uniformly polished.

Note that the magnets (22a>, (22b), and (22G>) are not completely fixed during the polishing process 8, but are connected via the support shaft (16) so as to maintain a certain degree of freedom.
13). Also, if necessary, it can be applied with a spring force of 14.1.

The embodiments of the present invention have been described above, and all of them are similar to the embodiment shown in FIG. 2
) can be polished while keeping the polished surfaces (2a), (2b), and (2c) in stable surface contact at all times. Therefore, local excessive polishing unlike conventional equipment is eliminated, and polishing can be performed to obtain a uniform planar state. It can also be installed on a machine robot or the like and used for automatic polishing.

By the way, in each of the above embodiments, the floating pulley (3a>,
Although the case using four (3b), (3c), and (3d) has been described, the number of floating pulleys j can be set arbitrarily.

Furthermore, in each of the above embodiments, the floating pulleys (3a), (3
Although the arrangement of b), (3c), and (3d) has been described as a right-angled arrangement, for example, an obtuse-angled arrangement or an acute-angled arrangement may be used.

In this way, this floating pulley (3a>, (3b), (3
c), (3d>), the number and arrangement of objects to be polished (1
) cover? 01 Can be changed as appropriate depending on the shape of the polished surface.

Further, in each of the above embodiments, the case where the belt-type polishing device is attached to the machine robot has been described, but the polishing process may be performed by holding the Bell 1-type polishing device in the hand of the worker.

[Effects of the Invention] As explained above, the belt type polishing device of the present invention has the following advantages:
A plurality of floating pulleys are disposed at a portion where a polishing belt having a polishing surface on which abrasive grains are laid is pressed against an object to be polished, and a plurality of planar polishing surface portions are formed between the plurality of floating pulleys,
Since the plurality of planar 01 polished surface portions are kept in a flat state by the flatness maintaining means during polishing, DI polishing can be performed in constant surface contact with the planar surface to be polished. This eliminates local excessive polishing and enables uniform polishing. iJI polishing accuracy can be improved. In addition, the arrangement and posture of the object to be polished and the belt-type polishing device during polishing can be adjusted appropriately depending on the shape of the surface of the object to be polished, allowing efficient polishing to be performed in extremely stable working conditions. .

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a belt type polishing device according to an embodiment of the present invention, Fig. 2 is an enlarged front view of main parts showing the tip of the belt type ω1 polishing device shown in Fig. 1, and Fig. 3 1 is a perspective view of the main part showing the tip of the belt-type polishing device shown in FIG. 1, FIG. FIG. 6 is a perspective view showing a belt-type polishing device according to still another embodiment of the present invention, and FIG.
An enlarged front view of the main parts showing the tip of the belt-type polishing device shown in the figure.
FIG. 8 is a perspective view showing a conventional belt type polishing device. In the figure, 1: Polished object, 2: Polishing belt, 2a, 2
b, 2C: m1leffi85.3a, 3b, 3c,
3d: floating pulley, 15a, 15b, 15c: flat plate, 16: support shaft, 21: auxiliary port-ra, 22a, 2
2b, 22c: Ta stone, 23: Magnetic material, 24: Non-magnetic material. In addition, in the figures, the same - red and the same symbols indicate the same or equivalent parts.

Claims (4)

[Claims] (1) An annular polishing belt having a polishing surface on which abrasive grains are laid, a drive pulley serving as a driving source to which the polishing belt is stretched, and a drive pulley that follows the belt and presses the polishing belt against the object to be polished. a plurality of floating pulleys provided therein, a plurality of planar polishing surface portions formed between the plurality of floating pulleys, and a plane maintenance device disposed so that the plurality of planar polishing surface portions maintain a flat state. A belt-type polishing device comprising: means. (2) The plane maintaining means arranged so that the plurality of planar polishing surface parts maintain a flat state includes a flat plate arranged on the back surface of each polishing surface part between the plurality of floating pulleys; It is characterized by comprising a support shaft vertically disposed in the center of each flat plate and movable integrally with the flat plate, and a spring installed around the support shaft to press the flat plate in the direction of each polishing surface. A belt-type polishing device according to claim 1. (3) The plane maintaining means arranged so that the plurality of planar polishing surface parts maintain a flat state includes an auxiliary roller arranged between the plurality of floating pulleys, and together with each of the floating pulleys, each polishing surface part 2. The belt-type polishing device according to claim 1, wherein the belt-type polishing device maintains a planar state of the polishing surface portion by being in flush contact with the back surface of the belt. (4) The plane maintaining means arranged to maintain the plane state of the plurality of planar polished surfaces includes magnets arranged between the plurality of floating pulleys and vertically arranged at the center of each of the magnets. Claim 1, further comprising a support shaft that supports the magnet so as to press the polishing surface portion between the magnet and the object to be polished so as to maintain a flat state. Belt type polishing device.