JP3127423B2 - Belt polishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt polishing apparatus for polishing a workpiece by pressing it against a rotating polishing belt.

[0002]

2. Description of the Related Art Conventionally, as a belt polishing apparatus, an endless belt-shaped polishing belt having an abrasive material fixed to an outer peripheral surface is rotatably wound around an apparatus body with a horizontal rotation axis, and the polishing belt is rotated. In some cases, a workpiece is configured to be pressed against a polishing belt from above and polished.

[0003] In this type of belt polishing apparatus, a support table is provided on the back side of the polishing belt, and the pressing force when the workpiece is pressed against the polishing belt and polished is applied to the flat support surface of the support table. It was a structure to receive in.

[0004] The bearing table is swingably supported by the apparatus main body with a horizontal swing axis. The bearing surface is formed on the upper surface of the swinging end, and the bearing surface is turned upward during polishing. A pressurizing device for urging and swinging the bearing table has been connected.

If the bearing surface is pushed up (to the workpiece side) at a constant pressure during polishing in this way, the polished surface of the workpiece can be uniformly polished.

[0006]

In the conventional belt polishing apparatus constructed as described above, the polishing portion is only a portion corresponding to the bearing surface of the bearing table, and can be polished only from above. For this reason, when the upper and lower surfaces of the workpiece are polished, one side is polished, then the workpiece is held and inverted, and then the opposite side is polished. In particular, when the workpiece is gripped by the industrial robot, the work efficiency is reduced because the above-described holding operation is required. If the upper and lower surfaces are to be polished without being changed in order to improve work efficiency, the robot hand will be forced to take an unreasonable posture. Further, the tension of the polishing belt is kept substantially constant by a tension pulley or the like, and the polishing belt may slip when the load pressing the workpiece against the polishing belt is increased.

[0007]

In the belt polishing apparatus according to the present invention, a support table is supported on a base via a substantially horizontal swing shaft so as to be vertically swingable, and one swing end of the support table is provided. A first pulley provided on a portion, a second pulley provided on a swinging end opposite to the first pulley with respect to the swinging shaft, and an independent state separated from the bearing table; Then, the polishing belt is brought into contact with a third pulley provided on the base side and a fourth pulley disposed between the third pulley and the first pulley. The pulley is positioned so that the polishing belt is along the support table between the first pulley and the polishing belt, and the polishing belt facing the back surface of the polishing belt is provided at one swing end of the support table where the first pulley is located. A bearing surface is formed, and on this bearing table, the workpiece is It is the concatenation of the pressure device for swinging and urges the workpiece side bearing table when it is pressed against the polishing belt in a position corresponding to the grinding belt bearing surface. A belt polishing apparatus according to a second aspect of the present invention is the belt polishing apparatus according to the first aspect, further comprising a moving device for moving the third pulley outward or inward of the polishing belt. It is.

[0008]

According to the belt polishing apparatus according to the first aspect of the present invention, the upper and lower sides of the support table can be polished. After being polished by being pressed against the polishing belt from above, the workpiece is conveyed below the support table, and the upper surface thereof is pressed against the polishing belt from below to polish. Therefore, the operation of changing the workpiece is not required. Also,
By swinging the support table, the center distance between the second pulley and the third pulley changes, and the center distance between the fourth pulley and the third pulley changes. Increases or decreases in length. For this reason, the tension of the polishing belt can be increased or decreased. According to the belt polishing apparatus of the second aspect, the tension of the polishing belt can be adjusted by the moving device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a front view of a belt polishing apparatus according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view. 2 and 3, the polishing belt is not shown. FIG. 4 is a perspective view showing a state in which a workpiece is being polished by the belt polishing apparatus according to the present invention. In these figures, reference numeral 1 denotes a belt polishing apparatus according to the present invention. The belt polishing apparatus 1 swings freely through a base 2 formed by a rectangular tube and a pivot 3 horizontal to the base 2. It comprises a supported support table 4, a polishing belt 5 wound around the support table 4, a pressurizing device 6 and the like interposed between the base 2 and the support table 4.

As the polishing belt 5, an endless belt having an abrasive material fixed to the outer peripheral surface is used.

The bearing table 4 is formed to be elongated in the horizontal direction, and the pivot 3 is fixed through substantially the center in the longitudinal direction. The pivot 3 is rotatably supported by a bearing member 7 fixed to the upper part of the base 2. The pivot 3 constitutes a swing shaft according to the present invention. A drive pulley 8 driven by an electric motor, which will be described later, is rotatably attached to one (right side in FIG. 1) swing end of the support table 4, and a guide pulley 9, 9 is rotatably mounted. The guide pulleys 9 and 9 constitute a first pulley according to the present invention, and the driving pulley 8 constitutes a second pulley according to the present invention. Reference numeral 10 denotes a guide pulley disposed immediately below the support table 4, and reference numeral 11 denotes a tension pulley. These pulleys are mounted so that the rotation axis is horizontal. The guide pulley 10 constitutes a fourth pulley according to the present invention, and the tension pulley 11 constitutes a third pulley according to the present invention.

The guide pulley 10 is disposed between the guide pulleys 9 and 9 and the tension pulley 11,
It is rotatably supported by a bracket 12 projecting downward from a side portion of the support table 4. The tension pulley 11 is provided on the base 2 side separately from the support table 4 so as to be separated from the support table 4, and is rotatably supported by a lifting section 14 of a tension cylinder 13 attached to the base 2. The position where the guide pulley 10 is provided is
As shown in FIG. 1, the polishing belt 5 is set so as to follow the support table 4 between the polishing belt 5 and the lower guide pulley 9. The tension cylinder 13 having the elevating unit 14 constitutes the moving device according to the second aspect of the present invention.

The polishing belt 5 is attached to the driving pulley 8, the guide pulleys 9, 10 and the tension pulley 11 and is wound around the support table 4.
As shown in FIG. 1, between the drive pulley 8 and the guide pulley 9, it passes right above the support table 4 along the support table 4, and otherwise passes below the support table 4. In addition,
A guide pulley 9 located at the swing end of the support table 4;
Between the guide pulley 10 located directly below the support table 4, the polishing belt 5 is passed under the support table 4 directly below the support table 4.

Reference numeral 15 denotes an electric motor for rotating the polishing belt 5. V is applied to the output shaft 15a of the motor 15.
The pulley 16 is keyed, and the V pulley 16 is connected to an idle pulley 17 rotatably supported on the pivot 3 by a V.
They are connected via a belt 18. The idle pulley 17 is connected via a V-belt 20 to a V-pulley 19 which is keyed to the pivot of the drive pulley 8. That is, when the output shaft 15a of the motor 15 rotates, the rotation is transmitted from the V pulley 16 to the V pulley 19 on the support table via the idle pulley 17, and the driving pulley 8 rotates together with the V pulley 19 to rotate the polishing belt. 5 will be driven.

The pressurizing device 6 comprises a main body 22 composed of an air cylinder containing a piston 21 and an air supply device 25 communicated with the main body 22 via an upper air pipe 23 and a lower air pipe 24. Have been.

The main body 22 of the pressurizing device 6 has an upper end pivotally supported by a lower end of a bracket 12 projecting from the support table 4, and a lower end connected to a piston 21.
Of the cylinder bracket 2a. Also,
The main body 22 is extended in its entire length by feeding air from the air supply device 25 to the upper air pipe 23,
It is configured such that the entire length is reduced by pumping air to 4.

That is, when the main body 22 is extended, the support table 4 swings clockwise about the pivot 3 in FIG. 1, and when it contracts, it swings in the opposite direction. The swinging position of the support table 4 when the main body 22 is extended most is indicated by a two-dot chain line A in FIG.

Reference numerals 26 and 27 denote bearing plates for receiving a pressing force when a workpiece W described later is pressed against the polishing belt 5 and polished. These support plates 26 and 27 are swinging ends of the support table 4 on the guide pulley 9 side, and are fixed to the upper surface and the lower surface of the support table 4, respectively. Further, the upper surface of the support plate 26 and the lower surface of the support plate 27 are flat surfaces (support surfaces), respectively, and face the back surface of the polishing belt 5 wound around the support table 4.

The belt polishing apparatus 1 configured as described above is installed adjacent to an industrial robot as shown in FIG. In 31 vertical multi-articulated industrial robot in FIG. 4, so that the base 31a is rotated about a vertical axis line C _1, arm 32 to 35 swings or rotates around the axis C ₂ ~ axis C ₆ Is configured. The arm 35 located on the tip side grips the workpiece W.

Next, the operation of the belt polishing apparatus 1 according to the present invention will be described. In order to polish the lower surface side of the workpiece W, the electric motor 15 is started and the polishing belt 5 is rotated, and the industrial robot 31 transfers the workpiece W to the polishing belt 5 as shown by a solid line in FIG. Press from above. The pressing position is a position corresponding to the support plate 26 located above the support table 4. And
At this time, air is supplied to the upper air pipe 23 of the pressurizing device 6 to urge the support table 4 so that the swinging end of the support table 4 on the guide pulley 9 shifts upward.

By biasing the bearing surface of the bearing table 4 upward (toward the workpiece) in this manner, the lower surface of the workpiece W is polished uniformly.

In order to polish the upper surface side of the workpiece W, the industrial robot 31 is operated to transport the workpiece W below the support table 4, and the workpiece W is polished as shown by a two-dot chain line in FIG. This is performed by pressing the upper surface of the workpiece W against the polishing belt 5 from below. The pressing position at this time is a position corresponding to the support plate 27 located below the support table 4. Further, at this time, air is pressure-fed to the lower air pipe 24 of the pressurizing device 6 to urge the support table 4 in a direction opposite to the above-described case.

As described above, the upper surface of the workpiece W is polished uniformly by swinging and biasing the bearing surface side of the bearing table 4 downward (toward the workpiece side). By swinging the support table 4 in the counterclockwise direction in FIG. 1 as described above, the drive pulley 8 and the guide pulley 10 move, and the distance between these pulleys and the tension pulley 11 changes. That is, the distance between the driving pulley 8 and the tension pulley 11 increases, and the guide pulley 1
The distance between 0 and the tension pulley 11 decreases. When the increase in the distance between the driving pulley 8 and the tension pulley 11 is larger than the decrease in the distance between the guide pulley 10 and the tension pulley 11, the polishing belt 5 is pulled by the difference in the distance, and the tension of the polishing belt 5 is reduced. When it increases and decreases, the tension of the polishing belt 5 decreases. For this reason,
The swing of the support table 4 can increase or decrease the tension of the polishing belt 5.

Therefore, since the upper and lower sides of the support table 4 can be polished, the upper and lower surfaces of the workpiece W are polished by pressing the lower surface of the workpiece W against the polishing belt 5 from above. The workpiece W is conveyed below the support table 4 and the upper surface thereof is pressed against the polishing belt 5 from below to polish the workpiece W. Therefore, the operation of changing the workpiece W is not required.

In this embodiment, the bearing table 4 is swung up and down by one air cylinder. However, as shown in FIG. 5, two air cylinders for ascending and descending are used as shown in FIG. Can also be used.

FIG. 5 is a front view showing another embodiment of the belt polishing apparatus. In FIG. 5, the same or equivalent members as those described in FIGS. Omitted.

In FIG. 5, reference numeral 41 denotes an air cylinder for urging and swinging the support table 4 so that the swinging end of the guide pulley 9 moves upward, and reference numeral 42 denotes an air cylinder for moving the support table 4 to the guide pulley 9 side. This is an air cylinder for urging and swinging the swinging end so as to be directed downward. These air cylinders 41, 42 are disposed at positions facing each other with the pivot 3 interposed therebetween.
a is pivotally supported on the bearing table 4. Even with such a configuration, the same effect as in the above embodiment can be obtained.

[0028]

As described above, in the belt polishing apparatus according to the present invention, the support table is supported on the base via a substantially horizontal swing shaft so as to be vertically swingable, and one of the support tables is swung. A first pulley provided at an end and a second pulley provided at a swing end opposite to the first pulley with respect to the swing shaft.
A third pulley provided on the base side separately from the support table and separated from the support table; and a fourth pulley disposed between the third pulley and the first pulley. And the fourth pulley is positioned so that the polishing belt and the first pulley are attached to a support table, and one of the rockers on the support table where the first pulley is located is positioned. On the moving end side, a polishing belt supporting surface facing the back surface of the polishing belt is formed. Since the pressurizing device that urges and swings to the work side is connected, it is possible to grind both upper and lower sides of the support table. Above polishing belt After polishing by pressing from polished by pressing from below the upper surface to the polishing belt to transport the workpiece beneath the bearing table. For this reason, since the operation of changing the workpiece is not required, the upper and lower surfaces of the workpiece can be efficiently polished. There is no need to force the industrial robot into an unreasonable posture. Also,
By swinging the support table in a direction in which one pulley is separated from the third pulley, the tension of the polishing belt can be increased or decreased. Therefore, in this belt polishing apparatus, the support table is used during polishing. By swinging in the direction, the force for pressing the workpiece can be adjusted while adjusting the tension of the polishing belt. Therefore, it is possible to increase the load for pressing the workpiece against the polishing belt while preventing the polishing belt from slipping. According to the belt polishing apparatus of the second aspect, since the tension of the polishing belt can be adjusted by the moving device, the tension of the polishing belt can be more reliably adjusted.

[Brief description of the drawings]

FIG. 1 is a front view of a belt polishing apparatus according to the present invention.

FIG. 2 is a plan view of the belt polishing apparatus according to the present invention.

FIG. 3 is a side view of the belt polishing apparatus according to the present invention.

FIG. 4 is a perspective view showing a state in which a workpiece is being polished by the belt polishing apparatus according to the present invention.

FIG. 5 is a front view showing another embodiment of the belt polishing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Belt polishing device 3 Axis 4 Bearing table 5 Polishing belt 6 Pressurizing device 26 Bearing plate 27 Bearing plate 41 Air cylinder 42 Air cylinder

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B24B 21/00 B24B 21/10 B24B 21/16

Claims (2)

(57) [Claims] An endless belt-shaped polishing belt having an outer peripheral surface formed as a processing surface is rotatably wound around a substantially horizontal axis of rotation, and a workpiece to be processed is mounted on a portion on the back side of the polishing belt. In a belt polishing apparatus provided with a support table for receiving a pressing force when pressing and polishing the support table, the support table is attached to a base via a substantially horizontal swing shaft.
It is supported so that it can swing up and down.
The first pulley provided at the moving end and the first pulley
A second pump provided at the swinging end opposite to the swinging shaft.
And separate from the bearing table
And a third pulley provided on the base side, and the third pulley
A fourth pulley disposed between the first pulley and the first pulley;
And the fourth pulley is polished.
Make sure the belt rests on the bearing table between the first pulley
The first pulley in the bearing table
On one of the swinging ends where the
A polishing belt bearing surface is formed, and when the workpiece is pressed against the polishing belt at a position corresponding to the polishing belt bearing surface, the bearing table is urged toward the workpiece to oscillate. A belt polishing apparatus, wherein a pressure apparatus for moving the belt is connected. 2. A belt polishing apparatus according to claim 1, wherein
Move the third pulley outward or inward of the polishing belt
Belt polishing apparatus comprising a moving device for moving
Place.