JPH0647232B2 - Electric polishing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric polishing apparatus used for surface polishing of molds, precious metals, dental technicians, and various other articles.
The purpose is to carry out highly accurate polishing in a short time by hand.

2. Description of the Related Art A conventional electric polishing apparatus can only rotate, swing, reciprocate, etc., a polishing tool in a single direction. Therefore, the polishing tool and the same portion of the workpiece repeatedly come into contact with each other, and scratches and uneven wear are likely to occur. Further, once scratches and uneven wear occur, they rapidly progress.

In order to prevent this, an operator moves the polishing tool back and forth in a direction intersecting the forward and backward direction of the polishing tool. However, since the forward / backward movement by the operator's hand is significantly slower than the case where the forward / backward movement is performed by the electric motor, the above-mentioned drawback cannot be eliminated.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention is intended to solve the above-mentioned problems, and causes a polishing tool to perform a reciprocating motion and a swing motion in a direction intersecting the reciprocating motion direction axis. By this method, it is possible to prevent the polishing tool and the same part of the workpiece from repeatedly contacting with each other, without causing scratches or uneven wear, and without requiring the operator to move the polishing tool. It aims to enable polishing work.

Means for Solving the Problems In order to solve the above problems, the present invention connects an crank shaft to an eccentric shaft that rotates by connecting to a first electric motor and allows the crank shaft to be eccentrically rotated. , Connect the joint shaft in the direction that intersects the axial direction of the crank shaft,
A fixed spindle for fixing the polishing tool is swingably connected to the joint shaft that moves forward and backward with the rotation of the crankshaft, and the main arm with the fixed spindle mounted so that it can move forward and backward The main arm is rotatably connected via a rotary shaft, and the main arm is connected and fixed to a swing piece that rotates via a rotary shaft. The eccentric shaft for eccentrically rotating the swing piece serves as the first electric motor. A separate second electric motor for pendulum movement is connected to the pendulum for pendulum movement.

The eccentric shaft is composed of a mounting member and an eccentric collar rotatably and fixedly inserted into the mounting member.
The shaft center of the mounting recess provided in the mounting member is formed eccentric to the shaft center of the mounting member, and the shaft center of the eccentric collar inserted into the mounting recess of the mounting member is eccentric. Alternatively, the insertion recess may be formed, the crank shaft may be mounted in the insertion recess, and the eccentric amount of the crank shaft may be adjusted by rotating the mounting member within the eccentric collar.

Further, the eccentric shaft for pendulum-moving the swing piece may be an adjust shaft for adjusting the eccentricity, which is fixed to the outer circumference so as to be rotatable and fixable so as not to come into contact with the swing piece.

The joint shaft may be rotatably connected to a fixed spindle via a ball joint.

Operation Since the present invention is configured as described above, the polishing tool is moved forward and backward by the turning force of the first electric motor. At the same time, the spindle to which the polishing tool is fixed is oscillated by the main arm in the direction intersecting the forward / backward movement axis by the turning force of the second electric motor.

Therefore, it is possible to cause the polishing tool to perform reciprocating motion and swing motion in a direction intersecting the reciprocating motion direction axis. Moreover, the reciprocating motion and the swinging motion are performed by the first and second separate electric motors. Then, by arbitrarily selecting the ratio of the reciprocating motion and the oscillating motion, the trajectory of the polishing tool can be freely set to a straight line, a circle, an ellipse, a Lissajous figure from a low order to a high order, or the like.

Therefore, the contact part of the polishing tool and the object to be polished is not concentrated in one part and can be contacted evenly, scratches, uneven wear, etc. are extremely unlikely to occur, and polishing processing that matches the shape of the polishing part is possible Becomes

The operation of the present invention will be described more specifically. When the first electric motor is operated, the eccentric shaft that is in contact with the first electric motor rotates, and the crankshaft rotates eccentrically with the rotation of the eccentric shaft. Move. Further, a joint shaft connected to the crank shaft in a direction intersecting with the axial direction of the crank shaft is moved back and forth. And connected to this joint shaft,
The fixed spindle with the polishing tool fixed is moved back and forth simultaneously.

If the second electric motor is operated at the same time as the operation of the first electric motor, the eccentric shaft is eccentrically rotated, and the swing piece connected to the eccentric shaft is pendulum-moved. By the pendulum movement of the swing piece, the main arm connected to the swing piece is swung. Since the fixed spindle is attached to the main arm so as to be able to advance and retreat, the polishing tool fixed to the fixed spindle simultaneously performs the forward and backward movement and the swinging movement in the direction intersecting with the forward and backward movement axis.

Therefore, by freely selecting the ratio of the reciprocating motion and the oscillating motion as described above, the trajectory of the polishing tool can be freely set to a straight line, a circle, an ellipse, or a Lissajous figure from low to high order. I can. Therefore, the contact portion of the polishing tool and the object to be polished is not concentrated in a part, and it is possible to make even contact.
Scratches, uneven wear, etc. are extremely unlikely to occur, and polishing processing that matches the shape of the polishing portion becomes possible.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. (1)
Is a first electric motor, and a planetary gear (4) and an internal gear (5) are sequentially connected from a sun gear (3) fixed to the outer periphery of the main shaft (2) to form a reduction mechanism. Then, the eccentric shaft (6) is connected through this reduction mechanism.

The eccentric shaft (6) includes a mounting member (7) and the mounting member (7).
(7) An eccentric collar that can be rotated and fixed inside
It consists of (8) and. Then, the axis of the mounting recess (10) provided in the mounting member (7) is formed eccentric to the axis of the mounting member (7). Also, the mounting recess (1) of this mounting member (7)
The eccentric collar (8) to be inserted in (0) also forms an insertion concave portion (11) with the axial center of the eccentric collar (8) eccentric. Then, in the insertion recess (11), the crankshaft
(12) is mounted via the bearing (13).

In addition, the eccentricity of the crankshaft (12) is adjusted to the mounting member (7).
This can be adjusted by rotating the eccentric collar (8) and the eccentric collar (8) in the circumferential direction, and the adjustment position is fixed by the fixing screw (14).

Then, a joint shaft (15) is connected to the crank shaft (12) in a direction intersecting the axial direction of the crank shaft (12). Further, a fixed spindle (17) for fixing the polishing tool (16) can be swung via a ball joint (18) on a joint shaft (15) that moves back and forth with the rotation of the crank shaft (12). Connected.

Further, the main arm (20) on which the fixed spindle (17) is mounted so as to be able to move back and forth is attached to the mounting body (21) by the rotating shaft (22).
Is connected rotatably via a through hole, and a split groove (23) is provided at the tip end side in the axial direction of the side surface. And this split groove
(23) via the mounting piece (24) slidably mounted,
Fix the lock screw (25) of the polishing tool (16) to the spindle
It is installed at (17).

In addition, in the fixed spindle (17), the pressing spring (2
The ball joint (18) is constantly pressed by the urging force of 6). The urging piston (27) is slidably mounted so that the forward / backward movement of the joint shaft (15) is reliably transmitted to the fixed spindle (17).

Also, the main arm equipped with the fixed spindle (17)
One piece (30) of the L-shaped swing piece (28) is connected and fixed to (20). Then, in the other piece (31) positioned at a right angle to the one piece (30), a long groove (32) having a longitudinal axis parallel to the joint shaft (15) is formed.

Then, the bearing (34) of the eccentric shaft (33) for eccentrically rotating the swing piece (28) is inserted into and connected to the long groove (32).
This eccentric shaft (33) is at the end opposite to the bearing (34),
An eccentrically fixed insertion shaft (35) is provided, and this insertion shaft (35)
Is inserted into the swing shaft (36) so that it can be rotated and fixed. Further, an adjusting shaft (37) is fixed to the outer periphery of the eccentric shaft (33) so as not to come into contact with the swing piece (28), and is rotated and fixed with respect to the swing shaft (36) via the insertion shaft (35). It is possible to adjust the eccentricity of the eccentric shaft (33). Further, a second electric motor (38) for pendulum motion, which is separate from the first electric motor (1), is connected to the swing shaft (36).

Further, in the drawing, (40) is a front lid body, the upper part of which is fixed to the mounting body (21) by the mounting screw (41), and the fitting protrusion of the mounting body (21) is fitted into the fitting recess (42) at the lower end. (43) is fitted and fixed.

When the first electric motor (1) is operated in the structure as described above, the sun gear (3),
The eccentric shaft (6), which is connected via a reduction mechanism including a planetary gear (4) and an internal gear (5), rotates. With the rotation of the eccentric shaft (6), the crankshaft
The eccentric rotation of (12) causes the joint shaft (15) connected to the crank shaft (12) in a direction intersecting with the axial direction of the crank shaft (12) to move back and forth.

And ball joint to this joint shaft (15)
The fixed spindle (17) connected via (18) and fixed to the polishing tool (16) is simultaneously moved back and forth in the main arm (20).

At the same time as the operation of the first electric motor (1), the second electric motor
When (38) is activated, the eccentric shaft is moved through the swing shaft (36).
(33) rotates eccentrically, and causes the L-shaped swing piece (28) connected to this eccentric shaft (33) to perform a pendulum motion.

By the pendulum movement of this swing piece (28), the swing piece (28)
The main arm (20) connected to is rocked. Since the fixed spindle (17) is attached to the main arm (20) so as to be able to move forward and backward, the polishing tool (16) fixed to the fixed spindle (17) moves forward and backward and swings to intersect with the forward and backward direction axis. It will be performed at the same time as the dynamic movement.

Moreover, since the reciprocating motion and the oscillating motion are performed by the first and second separate electric motors, the polishing tool (16) is selected by arbitrarily selecting the ratio of the reciprocating motion and the oscillating motion.
The locus of can be freely set to a straight line, a circle, an ellipse, a Lissajous figure from low order to high order, etc. Therefore, polishing tools (1
The contact portion of 2) and the object to be polished are not concentrated in one part and can be evenly contacted, the occurrence of scratches and uneven wear is extremely small, and the polishing processing according to the shape of the polished portion becomes possible.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the polishing tool simultaneously performs the forward / backward movement and the swinging movement in the direction intersecting the forward / backward direction axis. Moreover, since the reciprocating motion and the swinging motion are performed by the first and second separate electric motors,
By arbitrarily selecting the ratio of the reciprocating motion and the oscillating motion, it is possible to freely set the trajectory of the polishing tool as a straight line, a circle, an ellipse, a Lissajous figure from a low order to a high order, or the like.

Therefore, the contact portion of the polishing tool and the object to be polished is not concentrated on one part and can be contacted evenly, scratches and uneven wear are extremely unlikely to occur, and polishing processing according to the shape of the polishing portion is possible. .

[Brief description of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a sectional view and FIG. 2 is a sectional view taken along the line AA in FIG. 1 with a front cover removed. (1) …… First motor, (6) …… Eccentric shaft (7) …… Mounting member, (8) …… Eccentric collar (10) …… Mounting recess, (11) …… Insertion recess (12)… … Crankshaft, (15) …… Joint shaft (16) …… Polishing tool, (17) …… Fixed spindle (18) …… Ball joint, (20) …… Main arm (21) …… Mounting body, ( 22) …… Rotating shaft (28) …… Swing piece, (33) …… Eccentric shaft (37) …… Adjust shaft, (38) …… Second motor

Claims (4)

[Claims] 1. A crankshaft is eccentrically rotatably connected to an eccentric shaft that rotates by connecting to a first electric motor, and a joint shaft is connected to this crankshaft in a direction intersecting with the axial direction of the crankshaft. , A joint spindle that moves forward and backward with the rotation of the crankshaft is swingably connected to the fixed spindle for fixing the polishing tool, and the main arm equipped with the fixed spindle so that the spindle can move forward and backward The main arm is rotatably connected via a rotary shaft, and the main arm is connected and fixed to a swing piece which rotates via a rotary shaft. The eccentric shaft for eccentrically rotating the swing piece is connected to the first electric motor. Is a separate electric motor for pendulum movement, and the pendulum movement is performed on the pendulum. 2. An eccentric shaft is composed of a mounting member and an eccentric collar inserted into the mounting member so as to be rotatable and fixed. The shaft center of a mounting recess provided in the mounting member is the shaft center of the mounting member. The eccentric collar, which is formed eccentrically and is inserted into the mounting recess of this mounting member, has an eccentric collar with an eccentric insertion recess, and a crankshaft is mounted in this insertion recess to mount the mounting member. The electric polishing apparatus according to claim 1, wherein the amount of eccentricity of the crankshaft can be adjusted by rotating the eccentric collar. 3. An eccentric shaft for pendulum movement of a swing piece is an eccentricity adjusting adjust shaft fixed to the outer circumference so as to be rotatable and fixable so as not to come into contact with the swing piece. The electric polishing apparatus according to claim 1, which is characterized in that. 4. The electric polishing apparatus according to claim 1, wherein the joint shaft is rotatably connected to a fixed spindle via a ball joint.