JPH0839421A - Barrel tank for barrel polishing device - Google Patents

Abstract

PURPOSE:To secure an accomodation capacity larger than as square columnar barrel tank although the rotational occupation space of a barrel tank is small, make the opening for accomodating a workpiece as large as that of the square columnar barrel tank and make it possible to accomplish polish processing in a short time. CONSTITUTION:This is a barrel tank for a barrel polishing device which is formed long in the rotation axial direction and polishes the work inside the barrel by revolving it. Accomodation parts 6, which accomodate fitting jugs for fitting the workpiece in a pitch angle of approximately 120 deg. from a body 5 of the barrel tank in a cross sectional view and in approximately the same radius from the axis of the barrel tank, are respectively provided protrudently so as to cover almost the total length of the body 5. Opening parts 9 for taking the work fitting jigs in and out are provided on the ends of the respective accomodation parts 6 and the opening parts 9 are made capable of being opened and closed by an opening/closing lid 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a barrel tank in a barrel polishing machine.

[0002]

2. Description of the Related Art As an example of a recent barrel polishing apparatus, there is provided a system in which a barrel tank revolves (and rotates f if necessary) as shown in FIG. 6, for example, in order to increase polishing efficiency. . In this barrel polishing apparatus, a barrel tank c in the shape of an approximately quadrangular prism is attached to the tip b1 of a cross-shaped arm b that is rotated F about a rotation axis a by a planetary gear mechanism. And the barrel tank c is
An opening d for inserting and removing a mounting jig for mounting an object to be polished is provided on two opposing surfaces, and each of the openings d, d can be closed by an opening / closing lid e.

[0003]

In such a barrel polishing apparatus, as shown in FIG. 7A, a relatively large object to be polished is taken in and out because the width g of the opening d of the barrel tank c is large. Although the polishing object can be polished in a relatively short time, there is an inconvenience that the accommodation amount of the polishing object cannot be increased so much. In addition, when the barrel tank rotates, the abrasive in the barrel tank is dropped from the upper side to the lower side (extremely falling) as shown by an arrow h in FIG. Therefore, the finished state of the polishing was not always good. Therefore, in view of such problems, the present inventor proceeded with research to improve the shape of the barrel tank.

As described above, such a barrel tank is assembled so as to revolve by the planetary gear mechanism (also so as to rotate on its own if necessary), so that it is a relatively large barrel polishing apparatus. Therefore, considering the work occupied area (space) and the energy required for driving, it is preferable that the rotation occupied space of the barrel tank be as small as possible. Therefore, upon improvement, it is necessary to make the diameter of the barrel tank substantially the same as the conventional one, to secure the volume as large as possible, and to configure a large amount of polished objects at the same time as the conventional one. I found it to be.

In order to satisfy such a condition that a large volume is obtained with a substantially constant diameter, for example, in Japanese Utility Model Laid-Open No. 57-17.
It is not inconceivable to divert the form of a barrel tank i (shown in FIG. 8) having a substantially octagonal prism shape as disclosed in Japanese Patent No. 7647. However, in the case of such an octagonal prism structure, the opening width (that is, the width of each side of the octagonal prism) L of the opening for inserting and removing the object to be polished becomes small even if the internal space can be expanded. In addition, the object to be polished in and out must be a small object, which is inconvenient for polishing a relatively large object to be polished.

Accordingly, the present invention is based on the problem that the rotation space occupied by the barrel tank is small (substantially the same as the conventional square column barrel tank) and the storage capacity is larger than that of the conventional square column barrel tank. The object of the present invention is to provide a barrel tank in a barrel polishing apparatus capable of securing a polishing object in a short time while ensuring a large opening width of a storage portion for a workpiece to be polished.

[0007]

To solve the above problems, the present invention employs the following means. That is, the barrel tank in the barrel polishing apparatus according to the present invention is a barrel tank in the barrel polishing apparatus that is configured to be long in the rotation axis direction and polishes an object to be polished by being revolved. A mounting jig for mounting an object to be polished can be accommodated from the main body of the tank at a pitch angle of about 120 degrees in a cross-sectional view and with substantially the same radial length from the axis of the barrel tank, and extends over substantially the entire length of the main body. Each of the accommodating parts having a length is projected, and an opening for inserting and removing a mounting jig for attaching an object to be polished is provided at the tip of each accommodating part, and the opening can be opened and closed by an opening / closing lid. It is characterized by.

In the barrel tank, the opening / closing lid is preferably constructed such that one side thereof is pivotally attached to one side of the opening by a hinge and the other side is fixed to the other side of the opening by a clamp. In this case, a rubber packing is provided on the peripheral portion of the inner surface of the opening / closing lid, and the edge of the opening is
It is preferable that the hooking portion of the mounting jig be a locking portion for locking, and the opening / closing lid in a closed state presses the hooking portion via the rubber packing.

In the present invention, the jig for mounting the object to be polished is
Although it is detachable from the opening, it may be fixed by appropriate means. Further, the opening / closing lid may be fixed to the barrel tank by using a detachable stopper. The size of the storage section (including the change in the length in the radial direction from the axis of the barrel tank) is preferably the same for all three in consideration of the center of gravity of the barrel tank, but there are some differences. No problem.

[0010]

The present invention employs a configuration in which openings are provided at a pitch angle of 120 degrees, so that it occupies substantially the same rotating space as a conventional square column barrel tank (ie,
As is clear from comparison between FIG. 7 (A) and FIG. 7 (B), the entire barrel tank is accommodated within substantially the same diameter D centered on the axis of the barrel tank), and its opening width is reduced. Without this, a relatively large object to be polished can be easily taken in and out. In addition, the storage capacity can be expanded (enlarged by about 1.5 times compared to the square-pillar barrel tank), and a large amount of polishing processing can be performed at one time (compared to the case where the square-pillar barrel tank is used. About 1.5 times) is possible.

Since the object to be polished is fixedly placed in the accommodating portion provided at a pitch angle of 120 degrees, the abrasive material is rotated during rotation of the barrel tank as shown by an arrow H in FIG. In addition, it performs a sliding motion due to gentle skidding.
Therefore, even if the rotation is increased a little, the extreme falling phenomenon that occurs in the conventional barrel tank that forms a square pole does not occur, a moderate drop impact can be obtained, and a relatively smooth polishing process can be performed in a short time. I can.

Further, since the accommodating portion is provided at the pitch angle of 120 degrees, the flow state of the polishing material in the barrel tank is from the upper side to the lower side like the polishing material in the barrel tank of the conventional square pole. In addition to the one-way flow, the internal polishing material is always dispersed in the three accommodating parts. Therefore, the rotation balance when the barrel tank is rotating becomes good, and the rotation of the barrel tank becomes smooth.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view of a barrel polishing apparatus 1 according to the present invention. The tip 3a of a cross-shaped arm 3 rotated around a rotation axis 2 by a driving device (not shown) including a planetary gear mechanism according to the present invention. The barrel tank 4 is mounted so as to be able to revolve (and to rotate as needed). The details of the barrel polishing device including the driving device belong to a conventionally known configuration, and thus detailed description thereof is omitted here.

As shown in FIGS. 2 and 3, the barrel tank 4 has a horizontally long box shape elongated in the axial direction.
From the above, the accommodating portions 6 are respectively provided so as to extend over substantially the entire length of the main body 5 at a pitch angle of approximately 120 degrees in a sectional view and at substantially the same radial length from the rotation axis of the barrel tank. An opening 9 is provided at the tip of the opening 9 for inserting and removing the attachment jig 7 for the object to be polished, and the opening 9 can be opened and closed by the opening / closing lid 10.
A shaft 11 provided at the end 3a of the arm is provided on the end face of the barrel tank.
Is provided with a bearing mounting portion 8 for supporting

The opening / closing lid 10 has a hinge 1 on one side 12 thereof.
3 is pivotally attached to one side 15 of the opening 9, and the other side 16 of the opening / closing lid is fixed to the other side 19 of the opening 9 by a clamp 17. A rubber packing 20 is disposed on a peripheral portion of an inner surface of the opening / closing lid 10, and a short side portion of the opening 9 is a lower one-side engaging surface 21.

The mounting jig 7 is, as shown in FIG.
A holding member 23 comprising a pair of holding members 22, 22 is provided on each of the right and left sides to extend in the length direction of the housing portion and hold the object 22 to be polished (FIG. 3). Hanging pieces 25, 25 that hang on the hanging surface 21 are provided.
The hooking pieces 25, 25 of the mounting jig 7 having such a configuration are
When the opening / closing lid 10 is closed after the engaging surfaces 21 and 21 are brought into contact with each other, the rubber packing 20 elastically presses the engaging pieces 25 and 25, as shown in FIG. As a result, the mounting jig 7 is fixed to the opening 9.

Next, the procedure for performing the polishing operation by the barrel polishing apparatus having the above construction will be described. As shown in FIG. 3, the opening / closing lids 10 of the respective barrel tanks are opened to hold a required number of polished objects 22. The mounting jig 7 is inserted into the opening 9, and the hooking pieces 25, 25 are attached to the hooking surfaces 21, 2 of the opening.
1 and the opening / closing lid 10 is closed. Barrel tank 3
In the inside, for example, the abrasive 26
(FIG. 7 (B)) is charged. The input of this abrasive is
For example, when closing the last opening, it may be inserted through this opening, or it may be inserted through a dedicated insertion port provided separately. After that, the driving device is operated to revolve the barrel tank 3 and, if necessary, to rotate on its own axis. As a result, the material to be polished is polished by the friction during the flow of the polishing material inside the barrel tank. The polishing action of the abrasive is the same as that described in the section of the above action.

[0018]

According to the present invention, the following excellent effects are exhibited. The present invention employs a configuration in which openings are provided at a pitch angle of 120 degrees.Thus, while occupying substantially the same rotation space as the conventional rectangular column barrel tank, without reducing the opening width, A relatively large object to be polished can be easily taken in and out. In addition, the storage capacity can be expanded (enlarged by about 1.5 times compared to the square-pillar barrel tank), and a large amount of polishing processing can be performed at one time (compared to the case where the square-pillar barrel tank is used. About 1.5 times) is possible. From the above, according to the present invention, polishing efficiency can be remarkably improved, and productivity can be improved and cost can be reduced as compared with the case of using a conventional rectangular column barrel tank.

In the present invention, the accommodating portion is provided at a pitch angle of 120 degrees. Therefore, when the barrel tank rotates, the abrasive performs a sliding motion due to a gentle side slip. Therefore, even if the rotation is slightly increased, a sharp falling phenomenon from the upper side to the lower side does not occur as in the conventional barrel tank forming a square pillar, an appropriate drop impact is obtained, and it is short and relatively smooth. Polishing treatment can be performed.

Further, since the accommodating portions are provided at a pitch angle of 120 degrees, the flow state of the abrasive in the barrel tank is from the upper side to the lower side, like the abrasive in the conventional square column barrel tank. In addition to the one-sided flow, the inside abrasive material can always be in a state of being dispersed in the three accommodating portions. Therefore, the rotation balance when the barrel tank is rotating becomes good, and the rotation of the barrel tank becomes smooth. Therefore, the periodic load fluctuation received by the drive unit of the barrel polishing apparatus is small (the load received by the rotating shaft and the gear changes greatly in a 180 degree cycle in the square barrel barrel tank), and therefore the barrel polishing apparatus fails to occur. There is also an advantage that it can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view illustrating a barrel polishing apparatus using a barrel tank according to the present invention.

FIG. 2 is a perspective view showing a barrel tank.

FIG. 3 is a cross-sectional view showing a barrel tank.

FIG. 4 is a perspective view showing a mounting jig.

FIG. 5 is a cross-sectional view illustrating a closed state of the opening / closing lid.

FIG. 6 is an explanatory view illustrating a barrel polishing device using a conventional barrel tank.

FIG. 7 is a cross-sectional view showing a conventional barrel tank and a barrel tank according to the present invention in comparison.

FIG. 8 is a front view illustrating a conventional barrel tank having an octagonal prism shape.

[Explanation of symbols]

 Reference Signs List 3 Barrel tank 5 Main body 6 Housing 7 Mounting jig 9 Opening 10 Opening / closing lid 20 Rubber packing

Claims (3)

[Claims] 1. A barrel tank in a barrel polishing apparatus which is configured to be long in the direction of the rotation axis and is revolved to polish an object to be polished therein, wherein the barrel tank is substantially 120 in cross-sectional view from the main body of the barrel tank. At a pitch angle of about, and with substantially the same radial length from the axis of the barrel tank, can accommodate a mounting jig for mounting the object to be polished, and each of the housing portions projecting length substantially the entire length of the main body, is provided. A barrel in a barrel polishing apparatus, characterized in that an opening for inserting and removing a mounting jig for attaching an object to be polished is provided at the tip of each housing portion, and the opening can be opened and closed by an opening / closing lid. Tank. 2. The opening / closing lid is configured such that one side is pivotally connected to one side of the opening by a hinge and the other side is fixed to the other side of the opening by a clamp. Item 2. A barrel tank in the barrel polishing apparatus according to Item 1. 3. An opening / closing lid in a closed state, wherein a rubber packing is provided on a peripheral portion of an inner surface of the opening / closing lid, and an edge of the opening is a locking portion for locking a hook of a mounting jig. The barrel tank in the barrel polishing apparatus according to claim 1 or 2, wherein the barrel tank is configured to press the hook portion via the rubber packing.