JP2916937B2 - Barrel polishing method and apparatus - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a barrel polishing method and apparatus, in which the movement of a workpiece in a tank is complicated and varied, and the entire workpiece is uniformly and rapidly raised in a short time. The polishing finish can be performed with high precision.

(Prior art) Conventionally, in the barrel polishing method, a polishing cylinder (tank) is mounted on a gantry or a drum, and the center point of the inner circumference of the polishing cylinder and the axis for rotating the polishing cylinder are coaxial. There is a method in which a polishing cylinder is rotated by an electric motor or rotated in the same rotation as a drum to give a centrifugal force to perform polishing. The flow (movement) of the workpiece or the abrasive material is in the same circular motion and only a constant movement is performed, and only the upper layer of the mass is polished by the avalanche phenomenon.

(Problems to be Solved by the Invention) However, in the above-described conventional method, unevenness occurs in polishing, polishing residues are generated on concave portions, curved surfaces, and back portions, resulting in uneven finish, and dents on a workpiece. However, in such a polishing method, when performing polishing until the purpose is achieved, sufficient high-quality polishing cannot be obtained even if the rotation speed is slowed down for a long time.

SUMMARY OF THE INVENTION The present invention is directed to an improvement of the above-described prior art, and provides a barrel polishing method and apparatus capable of uniformly and highly precisely polishing finishing a workpiece in a short time.

(Means for Solving the Problems) In order to achieve this object, a barrel polishing method and apparatus according to the present invention are used for supporting a polishing tank in a manner rotatably inclined with respect to a rotary drum or a mounting table. The polishing vessel axis is perpendicular to both end faces of the polishing vessel, and exists on a plane including the center of the polishing vessel, and on both sides of the polishing vessel,
The shortest distance from the intersection between the polishing tank axis and one end face of the polishing tank to the outer wall surface of the polishing tank is a, and the shortest distance between the intersection of the polishing tank axis and the other end face of the polishing tank and the shortest distance between the outer wall faces of the polishing tank is b. ≠ b is satisfied, and the conventional problem is solved by causing the polishing tank to perform a variety of complicated rotations. Further, the present invention reduces the number of rotations of the rotary drum and the rotation axis of the polishing tank. A mechanism for increasing / decreasing is provided, and after loading an abrasive and a workpiece into a polishing tank that rotates in conjunction with a rotating rotary drum, the rotation of the polishing tank is reversed from the same as the rotary drum via a transmission mechanism. The workpiece is polished by arbitrarily setting the number of rotations such as intermittent, repetitive rotation, increasing rotation, decreasing rotation, etc., and making the rotation and rotation suitable for the purpose and the complicated flow in the tank. In the above polishing machine, a polishing tank or To prevent vibration due to unbalance of the machine, the balancing weight, flywheel, it is intended to provide a heavy pulleys or large diameter pulley.

(Operation) According to the present invention configured as described above, when the polishing tank is rotatably inclined and supported with respect to the rotary drum or the mounting table, the polishing tank shaft is attached to both end surfaces of the polishing tank. Perpendicular to the polishing tank and on a plane including the center of the polishing tank, and on both sides of the polishing tank, on the plane, from the intersection of the polishing tank axis and one end face of the polishing tank. According to the processing purpose, a is the shortest distance to the outer wall surface, and b is the shortest distance between the intersection of the polishing tank axis and the other end surface of the polishing tank and the outer wall surface of the polishing tank. The abrasive or workpiece in the tank draws a trajectory that swings up, down, left, and right in the tank, and moves in an elliptical or rugby ball shape, causing various flows due to complicated movements to enhance the polishing effect. is there.

Furthermore, due to the rotation difference between the rotation of the rotary drum and the axis of the polishing tank that rotates the polishing tank, the movement of rubbing, friction, and agitation of the abrasive or the workpiece in the polishing tank becomes more complicated and diverse, and repeats the same orbit. There is a great effect that the whole workpiece can be polished uniformly and in a short time with high quality without any problem.

By utilizing the present invention, even in the case of an apprentice without special skill required as in the conventional hand processing technique, the lid of the polishing tank is opened and a predetermined amount of the workpiece or the abrasive is placed therein. By simply closing the lid of the charging tank and starting the electric motor, a high-level polishing process can be completed after a predetermined polishing time has elapsed by the timer.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Reference numeral (M) in the drawings indicates an electric motor, which is a driving force for operating the barrel polishing apparatus of the present invention. (1) is a rotary drum formed in a reel shape, having a main shaft (4) as an axis, and rotatably supported by main bearings (6) provided on the left and right inner portions of the polishing apparatus main body (12). A large pulley (10) is integrally attached to the rotary drum (1).

(2) is a polishing tank in which an abrasive (7) and a workpiece (8) are sealed, and is set in a polishing tank receiver (2a). The polishing tank (2) is provided with the rotary drum (1). A plurality (three in the drawing) is provided near the outer periphery, and rotates differently from the rotation of the rotary drum (1) via a conversion device (not shown) in which a gear, a pulley, a transmission, or the like is combined. When the polishing tank (2) is rotatably inclined and supported on the rotary drum (1) or the erection table, the polishing tank shaft (3) is connected to both ends of the polishing tank (2). It is perpendicular to the planes (13) and (14), and exists on a plane including the center of the polishing tank (2), and is opposed to both end faces (13) and (14) of the polishing tank (2). On the plane, polishing is performed from the intersection of the polishing tank axis (3) and one end surface (13) of the polishing tank (2). Shortest distance a to the outer wall surface (15), polishing tank axis (3) and the other end face of the polishing tank (2) (14)
And the shortest distance from the intersection with the outer surface of the polishing tank (16) is b, so that a ≠ b is satisfied. Therefore, the enclosed abrasive (7) and the workpiece (8) are Since the flow polishing is performed in a complicated state that cannot be performed, the polishing finish with extremely high precision can be performed.

(3) is a polishing tank shaft protruding outward on both sides of the polishing tank receiver (2a) as described above. The polishing tank holder (2a) rotates around the polishing tank shaft (3). It has become
(2b) is a polishing tank fixture.

(4) is a main shaft of the rotary drum (1), and the rotary drum (1) is configured to rotate constantly around the main shaft (4), and the main shaft (4) is a polishing apparatus main body (12). The main bearings (6) provided on the left and right inner sides of the shaft.

Polishing tank shaft (3) of the present invention thus configured
As shown in FIG. 15, this polishing tank axis (3) is on a plane perpendicular to both end faces (13) and (14) of the polishing tank (2) and including the center of the polishing tank (2). The polishing tank shaft (3) and one end face (13) of the polishing tank (2) are present on the plane with respect to both end faces (13) and (14) of the polishing tank (2). The shortest distance from the intersection to the polishing tank outer wall surface (15) is a, and the polishing tank shaft (3) and the other end face (1
The shortest distance between the intersection with 4) and the outer wall of the polishing tank (16) is b
Therefore, since a ≠ b is satisfied, the rotation is more complicated, so that it is very effective for gloss and mirror polishing, which require extremely fine polishing.

(Effects of the Invention) Since the present invention is configured as described above, even if the workpiece to be put into the polishing tank has any complicated shape, the polishing finish is uniform in a short period of time and has extremely high precision. Can be easily done.

[Brief description of the drawings]

FIG. 1 is a side view showing the relationship between a rotary drum and a polishing tank of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 ab is a center axis displaced. FIG. 4 is a front view and a side view of a polishing tank receiver in which the axis of the polishing tank receiver is different in length from an edge on a plane intersecting the end face of the polishing tank with respect to the plane including the center axis. Side view of the polishing tank displaced as described above, FIG. 5 is a front view of FIG. 4, and FIG.
FIG. 7 is a diagram showing the flow state of the abrasive and the workpiece during operation by a line, FIG. 8 is a diagram showing the flow state of the abrasive and the workpiece in a state displaced as described above, FIG. 9 is a view showing the flow of the abrasive and the workpiece in the state of being displaced as described above in an inclined manner, FIG. 10 ab is a front view and a right side view of an embodiment of the present invention, and FIG. FIG. Ab is a front view and a right side view showing an example of a conventional method, FIG. 12 is a view showing a state of polishing by a conventional method, and FIG. 13 is a diagram showing flows of abrasives and workpieces in a conventional polishing tank. FIG. 14 is a view showing the flow in the tank of the present invention, and FIG. 15 is a view showing conditions a and b required for supporting the polishing tank at an angle to the axis of the polishing tank. It is. 1 ... rotary drum, 2 ... polishing tank, 2a ... polishing tank receiver, 2b ... polishing tank fixture, 3 ... polishing tank shaft, 4 ... spindle, 5 ... conduction band, 6 ... main bearing , 7 ... abrasive, 8 ...
... Workpiece, 9 ... Lid, 10 ... Large pulley, 11 ... Axial center of polishing tank, 12 ... Polishing machine body, 13,14 ... End face, 15,16
…… Polishing tank outer wall

Claims (3)

(57) [Claims] A single or a plurality of polishing tanks are rotatably rotated by power with respect to a polishing tank shaft on a rotary drum or a gantry mounted on the same main shaft as a large pulley driven by an electric motor. In supporting rotatably inclined, the polishing tank axis is perpendicular to both end faces of the polishing tank, and exists on a plane including the center of the polishing tank, and both ends of the polishing tank are On the other hand, on the plane, a is the shortest distance from the intersection of the polishing tank axis and one end face of the polishing tank to the polishing tank outer wall surface, and the intersection of the polishing tank axis and the other end face of the polishing tank and the polishing tank outer wall face. Assuming that the shortest distance is b,
In order to satisfy a ≠ b, a workpiece or an abrasive or a combination thereof is thrown into the above-mentioned polishing tank, and the polishing tank is given the same rotation or a different rotation as the rotary drum to perform complicated movement. Barrel polishing method for polishing. 2. A workpiece or abrasive loaded therein, or a polishing vessel which generates pressure and complicated agitation or flow by rotation by power in the polishing vessel, and a polishing vessel or a plurality of polishing vessels. A barrel polishing apparatus comprising a rotary drum, which is mounted on the same main shaft as a large pulley driven by an electric motor and rotatably inclined with a polishing tank axis, or a mounting table, When the polishing tank is rotatably inclined and supported with respect to a rotary drum or an installation table, the polishing tank axis is perpendicular to both end faces of the polishing tank and on a plane including the center of the polishing tank. In addition, the shortest distance from the intersection of the polishing tank axis and one end face of the polishing tank to the outer wall surface of the polishing tank on the plane with respect to both end faces of the polishing tank is a, other The shortest distance between the intersection and the polishing tank outer wall surface of the surface as b, barrel polishing apparatus comprising so as to satisfy a ≠ b. 3. The unbalance rotation of the polishing tank or the polishing apparatus caused by the rotation of the polishing tank itself or the workpiece or the abrasive loaded in the polishing tank during the rotation, the flow load of the fluidized bed or the weight difference. The barrel polishing apparatus according to claim 2, wherein a balance weight is provided in the polishing tank, or a flyhole, a heavy load pulley, or a large-diameter pulley is provided in the drive shaft in order to prevent vibrations caused by vibration.