JPH0911109A - Drawing-out type polishing belt and polishing head device using the same - Google Patents

Abstract

PURPOSE: To reciprocate a drawing-out type polishing belt in the drawing-out direction to improve the polishing. CONSTITUTION: A timing belt 4 is removably attached through a fastener to the rear surface of a drawing-out type polishing belt 1 wound around a stock bobbin 2 and take-up bobbin 3 to be engaged with a drive pulley 6 for reciprocating the timing belt 4 in the drawing-out direction of the polishing belt 1, so that when the timing belt 4 is reciprocated the polishing belt 1 reciprocates relative to a workpiece to satisfactorily polish the workpiece like a sand-paper used manually.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed type polishing belt and a polishing head device using the belt.

[0002]

2. Description of the Related Art As is well known, an abrasive belt is a general term for a belt-shaped abrasive cloth paper. The method of contacting the abrasive belt with a workpiece is as follows. ) Platen (pressing) type and 3) free belt type.

One of the platen type polishing machines is known as a movable platen type polishing machine as shown in FIG.
That is, when the workpiece 4A having a large processing surface is polished by the endless polishing belt 3A running in the direction C 'stretched between the driving wheel 1A and the idle wheel 2A, a movable roller is provided on the back surface of the polishing belt 3A. -The movable roller is provided with
The polishing belt 3A is pressed against the surface of the workpiece 4A and polished while the reciprocation of the roller 5A in the direction D '.

On the other hand, for example, a putty applied to the surface of a railway car body (a build-up paint for improving the flatness for painting by filling in defects such as dents, cracks, holes and the like on the groundwork).
5 to 2 mm thickness) to polish the surface,
If an attempt is made to polish using the platen-type endless polishing belt as described above, the polishing surface of the polishing belt in a new state is different from the polishing surface of the polishing belt in a slightly clogged state due to the progress of the polishing operation. Moreover, it is easy to generate streak-like scratches on the polishing surface in the belt running direction.
Good finish cannot be obtained. In particular, a small width (for example, 10
When polishing a wide range of putty surfaces with a polishing belt of 0 mm), that is, a small-sized polishing machine, there is a problem that unevenness is likely to occur on the finished surface.

In order to solve such a problem, the present invention aims at using a polishing belt of a feeding / winding type (hereinafter, simply referred to as a feeding type in the present invention). It is intended to improve the polishing finish of the putty surface by reciprocating.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is as follows. 1) A polishing belt that is rolled over a stock bobbin and a winding bobbin and wound around each bobbin. And an endless backup belt which is detachably attached to the back surface of the polishing belt via a fastener and which is smaller in weight than the polishing belt, and a platen opposed to the work by combining the polishing belt and the backup belt. The backup belt is a timing belt, and 2) a stock bobbin and a take-up bobbin. A polishing belt wound on a roll, and detachably attached to the back surface of the polishing belt via a fastener, and having a smaller weight than the polishing belt. And Jo backup belt, these abrasive belts and backup belt combined word - In the polishing head device using a platen opposed to the click, the feed type grinding belt made of, the backup belt,
A polishing head apparatus using a feed-out type polishing belt, wherein the polishing head is stretched around a drive pulley for reciprocating and rotating in the feeding direction of the polishing belt.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail with reference to an embodiment shown in the accompanying drawings. FIG. 1 is a schematic perspective view of a main part of an embodiment of the present invention.
1 is a side view of FIG. 1, FIG. 3 is a sectional view of a main part of FIG. 2, and FIG.
FIG. 5 is a detailed sectional view of a main part of FIG.

The present embodiment is suitable for a small-size polishing machine which applies putty to the surface of a steel plate of a railway car body and grinds the putty to eliminate irregularities on the surface. This is convenient for efficiently and uniformly polishing a wide range of putty surfaces. Of course, it may be a putty of a building elevator box.

First, the polishing head device GH of this embodiment will be described. In particular, in FIGS. 1 and 2, 1 is a polishing belt (width 100 mm), and this polishing belt 1
The roll is wound around the stock bobbin 2 and the winding bobbin 3 and is fed in the direction of arrow C.

Reference numeral 4 denotes an endless backup belt (width 100
mm), and is stretched between the pair of idlers 5 and 5 and the drive pulley 6.

Reference numeral 7 denotes a pressing plate (plate-like platen) which presses the backup belt 4 and the polishing belt 1 together with the work 8. Alternatively, it is opposed to the pressing force of the work 8.

The pressing plate 7 has a plurality of rollers 7a, 7a,... As a roller-shaped platen as shown in FIG.
It may be. The use of the group of rollers 7a is convenient when the work surface is not always flat.

Here, the polishing belt 1 and the backup belt 4 are connected to the teeth 9a and 9b of the fastener 9 (FIG. 3).
(See Reference). Therefore, the drive pulley 6 is set at a predetermined angle (for example, 3 degrees) in the direction of arrow A in FIG.
0 °), the backup belt 4 also reciprocates in the same direction, so that the polishing belt 1 joined by the fastener 9 also reciprocates in the direction of arrow D as a unit. When the drive pulley 6 is rotated by a predetermined amount in the direction of arrow B in FIG. 1, the polishing belt 1 is also integrally rotated in the same direction, and a new portion of the polishing belt 1 is fed from the stock bobbin 2. The used portion of the polishing belt 1 is wound around the winding bobbin 3.

Accordingly, the pressing plate 7 is pressed together with the backup belt 4 and the polishing belt 1 in the direction F toward the work 8, and the drive pulley 6 is rotated by a predetermined angle at a predetermined speed (for example, 1000). When the work 8 is rotated in the forward and reverse directions in the direction of arrow A (reciprocation every minute), the surface of the work 8 is polished beautifully as if rubbed with sandpaper by hand. When the polishing ability is reduced due to clogging of the polishing belt 1 or peeling off of abrasive grains, the drive pulley 6 is rotated by a predetermined amount to feed out a new portion of the polishing belt 1 to maintain the polishing ability.

The operation of feeding and winding the new polishing belt 1 may be performed during the polishing process or after the polishing process is temporarily stopped.

Next, the details of the polishing belt 1, the backup belt 4 and the fastener 9 will be described.

In FIG. 3, the abrasive belt 1 has abrasive grains 11 adhered to a substrate 12 via an adhesive layer 10 on the front side, and one tooth 9 of a fastener 9 is attached to the back side of the substrate 12.
A tape 13a having a is attached. The backup belt 4 is constituted by a timing-toothed belt, that is, a timing belt 44 (the backup belt and the timing belt may be separated from each other and may be integrally connected). A tape 13b having 9 other teeth 9b is attached.

Therefore, the drive pulley 6 is constituted by a timing pulley 66 (see FIG. 5), and the reciprocating movement of the backup belt 4 is performed without slip.

Next, an outline of the entire polishing machine which performs a robot operation using the above-described polishing head device GH will be described.

In FIG. 4, the polishing head device GH is incorporated in the head frame 15, that is, the stock bobbin 2, the winding bobbin 3,
An idler 5, a drive pulley 6, a pressing plate 7, and the like are mounted. The head frame 15 is attached to the tip of the horizontal beam 16 so as to be swingable in the direction of arrow I on a vertical plane.

The horizontal beam 16 is attached to a main body frame 18 erected on a base 17 so as to be able to move up and down in the direction of arrow K and move forward and backward in the direction L. A base 17 on which the main body frame 18 is erected is slidably mounted on a pair of rails 19, 19 in the direction of arrow J.

Therefore, the polishing head device GH is
And moves up and down with respect to the main body frame 18 while moving in the left and right direction (the direction of the arrow J). Further, the polishing head device GH swings on a vertical plane about the axis of the horizontal beam 16 to change the running direction of the polishing belt 1. As a result, if the shape of the work 8 is previously taught to the polishing machine, the work 8 having a wide range of wavy surface can be automatically polished.

Next, a mechanism for reciprocating and rotating the polishing belt 1, that is, the backup belt 4, will be described.

Referring to FIG. 5, the reciprocating motion of the backup belt 4 will be described first. The driving pulley 6, that is, the timing pulley 66 is provided with the large ball bearing 20,
20 are rotatably supported by the head frame 15, and a shaft 21 for renewing the polishing belt penetrates through the rotation axis through small ball bearings 22, 22,. Has been inserted.

A reciprocating flange 23 is integrally provided at one end of the timing pulley 66. The tip of the swing arm 24 is positioned at an eccentric position of the reciprocating flange 23 via a bolt 25. It is fixed.

An eccentric ring 27 is connected to the base of the swing arm 24 via an eccentric pin 26 using a bolt. That is, an eccentric pin 26 is inserted into the swing arm 24 via a bearing 28, and a screw portion of the eccentric pin 26 is screwed into an eccentric ring 27 and fixed.

A first reciprocating timing pulley 30 is fixed to the rotating shaft 29 of the eccentric wheel 27. The first reciprocating timing pulley 30 is connected to a reciprocating timing belt 31 via a reciprocating timing belt 31. It is connected to a second reciprocating timing pulley 32. The second reciprocating timing pulley 32 is connected to a reciprocating motor 33.

The rotating shaft 29 of the eccentric wheel 27 is supported by a rotating member 35 via bearings 34, 34.

Accordingly, when the reciprocating motor 33 is started, the speed is reduced and the second reciprocating timing pulley 32 is decelerated.
→ Reciprocating timing belt 31 → First reciprocating timing pulley 30 → Rotating shaft 29 rotates eccentric wheel 27. As a result, the tip of the swing arm 24 eccentrically fixed to the eccentric wheel 27 swings about the eccentric pin 26, and the reciprocating flange 23 reciprocates and the timing Reciprocating the re-roller 66, and as a result, reciprocating the backup belt 4 → the fastener 9 → the polishing belt 1;

Next, rotation of the backup belt 4 (also referred to as polishing belt renewal) will be described.

At one end of the polishing belt renewal shaft 21,
A first update timing pulley 36 is fixed, and the rotating member 35 is fixed to the other end.

The first update timing pulley 36
Are connected to a second update timing pulley 38 via an update timing belt 37. The second updating pulley 38 is connected to an updating motor 39.

Therefore, when the update motor 39 is started, the speed is reduced and the second update timing pulley 38 → the update timing belt 37 → the first update timing pulley 36 → the polishing belt is updated. The rotating shaft 29 is rotated planetarily as the sun at the center of rotation of the timing pulley 66 by the use shaft 21 → rotating member 35, and as a result, the timing pulley 66 is rotated to update the polishing belt 1. .

Although not shown, the polishing belt 1 is extremely loosely formed between the portion joined to the backup belt 4 and each of the stock bobbin 2 and the winding bobbin 3 because the polishing belt 1 reciprocates. doing. Therefore, a tension pulley is interposed on the take-up bobbin 3 to apply tension to the polishing belt 1 only when the polishing belt 1 is renewed. The tension pulley is provided at the tip of a swing arm, and when the swing arm swings at a predetermined angle, a limit switch is operated and a motor for driving the winding bobbin 3 is provided. I try to stop. The polishing belt device GH does not necessarily need to be mounted on a robot, but may be mounted on a mere machine tool base.

[0035]

According to the present invention, since the feed-out type polishing belt is reciprocated and renewed in the feed-out direction of the polishing belt by the backup belt which is attached and detached via the fastener, the sanding belt is as if by hand. −
Like a par, not only can the polishing finish of the work be made uniform, but also a small backup belt is reciprocated and rotated, so that less mechanical vibration is generated. If the backup belt is a timing belt, the reciprocating movement and rotation of the polishing belt can be performed precisely without slip.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a main part of an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a sectional view of a main part of FIG.

FIG. 4 is an overall perspective view including FIG.

FIG. 5 is a detailed sectional view of a main part of FIG. 4;

FIG. 6 is a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Polishing belt, 2 ... Stock bobbin, 3 ... Winding bobbin, 4 ... Backup belt, 6 ... Drive pulley, 7 ... Pressing plate, 8 ... Work, 9 ... Fastener, 44 ... Timing belt

Claims (2)

[Claims] An abrasive belt that is rolled around a stock bobbin and a take-up bobbin and wound around each bobbin;
An endless backup belt which is detachably attached to the back surface of the polishing belt via a fastener and which is smaller in weight than the polishing belt; and a platen facing the work by combining the polishing belt and the backup belt. A feed-type polishing belt, wherein the backup belt is a timing belt. 2. A polishing belt extending between a stock bobbin and a take-up bobbin and wound around each bobbin,
An endless backup belt which is detachably attached to the back surface of the polishing belt via a fastener and which is smaller in weight than the polishing belt; and a platen facing the work by combining the polishing belt and the backup belt. A polishing head device using a feed-out type polishing belt comprising: a feed-out type polishing belt, wherein the backup belt is stretched around a drive pulley that reciprocates and rotates in the feed-out direction of the polishing belt. Polishing head device using