JPH07262B2 - 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 Conventional electric polishing apparatuses are generally capable of rotating, swinging, reciprocating, etc., a polishing tool in a single direction. Therefore, since the polishing tool and the same portion of the workpiece repeatedly come into contact with each other, scratches and uneven wear are likely to occur on the surface of the workpiece. Further, once this uneven wear occurs, it rapidly progresses.

In order to prevent such scratches and uneven wear, an operator moves the polishing tool back and forth in a direction that intersects the forward and backward movement direction of the polishing tool. However, since the forward / backward movement by the worker's hand is remarkably slow as compared with the case where the forward / backward movement is performed by the electric motor, the above drawback cannot be eliminated.

Further, an invention described in Japanese Patent Laid-Open No. 55-18314 is known as a polishing apparatus that simultaneously performs a forward / backward movement and a swinging movement so as to eliminate the above-mentioned drawbacks.

Problems to be Solved by the Invention However, the invention described in Japanese Patent Application Laid-Open No. 55-18314 has the drawback that the stability of the operation is poor and that the rotational trajectory of the polishing tool cannot be set accurately.

The present invention is intended to solve the above-described problems, and the rotation of one electric motor causes the polishing tool to perform a reciprocating motion and a swinging motion in a direction intersecting with the reciprocating motion direction. This movement prevents the polishing tool and the same portion of the workpiece from repeatedly contacting each other, and prevents scratches and uneven wear of the workpiece. Further, it is an object of the present invention to make it possible to perform a precise and quick polishing work by eliminating the movement of the polishing tool by the operator.

Means for Solving the Problems In order to solve the above problems, the present invention connects a crankshaft to an eccentric shaft that is connected to an electric motor and rotates, and connects the crankshaft to the crankshaft so that the crankshaft is eccentrically rotatable. A joint shaft is connected in a direction that intersects the axial direction of the shaft, and 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. The main arm that can be mounted is rotatably connected to the mounting main body through the rotary shaft, and the main arm is connected and fixed to the swing piece that rotates through the rotary shaft. The above-mentioned electric motor is connected to a cam shaft for rotation via a transmission member, and a swing piece is pendulum-moved in synchronism with advance and retreat of a fixed spindle.

The eccentric shaft comprises a mounting member, an eccentric collar rotatably and fixedly inserted into the mounting member, and a phase adjustment collar rotatably and fixedly mounted on the mounting member. The axis of the mounting recess is formed to be eccentric from the axis of the mounting member, and the eccentric collar inserted into the mounting recess of the mounting member forms an insertion recess eccentric to the axis of the eccentric collar. By mounting the crankshaft in the insertion recess and adjusting and rotating the mounting member in the eccentric collar, the eccentric amount of the crankshaft can be adjusted and the mounting member can be rotated in the phase adjusting collar. By doing so, the phase of the swing piece may be adjusted.

Further, the joint shaft may be rotatably connected to a fixed spindle via a ball joint.

Further, the camshaft has concentric circular concentric portions formed on both sides of the eccentric rotation portion, a convex portion protruding from the concentric circle formed at one end, and a concave portion concaved from the concentric circle at the other end. May be.

Further, the transmission member may be formed by a pair of timing pulley and timing belt.

Further, the transmission member may be formed by a pair of gears.

Action Since the present invention is configured as described above, in order to polish a target object, the polishing tool is moved forward and backward by the rotating power of the electric motor, and the fixed spindle fixed to the polishing tool is rotated by the electric motor. The main arm oscillates in a direction intersecting the forward / backward movement axis by power. The reciprocating motion and the oscillating motion of the polishing tool are performed by the same electric motor, and the reciprocating motion and the oscillating motion are synchronized with each other, whereby the trajectory of the polishing tool can be set to a shape having a curved motion and a linear motion. Therefore, the contact portion of the polishing tool and the object to be polished is not concentrated in one part and can be evenly contacted, and the surface of the object to be processed is rarely scratched or unevenly worn. Further, it becomes possible to carry out the polishing process according to the shape of the polished portion.

To explain the operation of the present invention more specifically, when the electric motor is operated, the eccentric shaft connected to the electric motor rotates. The crankshaft is eccentrically rotated with the rotation of the eccentric shaft, and the joint shaft connected to the crankshaft in a direction intersecting the axial direction of the crankshaft is moved back and forth. The fixed spindle connected to this joint shaft moves the polishing tool back and forth simultaneously.

Further, by the operation of the electric motor, the eccentric rotation part of the cam shaft is eccentrically rotated via the transmission member, and the swing piece connected to the cam shaft is pendulum-moved. Due to the pendulum movement of the swing piece, the main arm connected to the swing piece is swung with the turning shaft as a fulcrum. Since the fixed spindle is attached to the main arm so as to be capable of advancing and retreating, the polishing tool fixed to the fixed spindle simultaneously performs the advancing and retreating motion and the swinging motion in the direction intersecting with the advancing and retracting axis.

Therefore, by synchronizing the reciprocating motion and the oscillating motion as described above, the trajectory of the polishing tool can be set to a shape that intersects the curved line and the linear motion, so that the contact portion of the polishing tool and the object to be polished is concentrated in part. There is no problem, and it is possible to make uniform contact with the contact part. Therefore, the contact portion of the workpiece is hardly scratched or unevenly worn, and the polishing processing can be performed in accordance with the shape of the polishing portion. Also, since the reciprocating motion and the swinging motion are possible with one electric motor, the weight of the device is reduced,
It enables downsizing.

Further, the cam shaft has concentric circular concentric portions formed on both sides of the eccentric rotation portion, and a convex portion protruding from the concentric circle is formed at one end and a concave portion concavely formed from the concentric circle is formed at the other end. While the camshaft makes one rotation, the swinging motion of the fixed spindle makes a resting state twice to allow the polishing tool to draw a lobe-shaped trajectory, which enables polishing work according to the purpose.

If the transmission member is formed by a pair of timing pulley and timing belt, the eccentric shaft and the cam shaft can rotate in the same direction with a simple mechanism for reliable synchronous rotation. Allows accurate operation of the polishing tool without causing malfunction.

Further, if the transmission member is formed of a pair of gears, the eccentric shaft and the cam shaft rotate in synchronization with each other in the opposite direction, contrary to the above, and the polishing tool does not malfunction, etc. It enables various operations.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
Reference numeral (1) is an electric motor, which has a connecting member (3) fixed to the tip of the main shaft (2), and the eccentric shaft (4) is rotatably connected through the connecting member (3). The eccentric shaft (4) has a mounting member (5) and an eccentric collar (6) mounted in the mounting member (5) so as to be rotatable and fixable. The mounting member (5) has a mounting recess (7) into which the eccentric collar (6) is inserted, which is eccentric from the axis of the mounting member (5).

Further, the eccentric collar (6) to be inserted into the mounting recess (7) is also provided with an insertion recess (8) having an eccentric axis.
The crankshaft (11) is mounted in the insertion recess (8) via the bearing (10). The amount of eccentricity of the crankshaft (11) can be adjusted by rotating the mounting member (5) and the eccentric collar (6) in the circumferential direction, and the adjustment position can be adjusted by the fixing screw (12). Fix it.

A joint shaft (13) is connected to the crank shaft (11) in a direction intersecting the axial direction of the crank shaft (11). A fixed spindle (15) for fixing the polishing tool (14) is attached to the ball joint (1) on the joint shaft (13) which moves back and forth with the rotation of the crank shaft (11).
It is swingably connected via 6). Further, a cylindrical main arm (17) having this fixed spindle (15) mounted so as to be able to move back and forth is rotatably connected to a mounting body (18) located on the outer periphery of the device via a rotation shaft (20). ing.

Further, a concave groove (21) is formed in the axial direction of the outer peripheral surface of the fixed spindle (15) on the side opposite to the rotary shaft (20), and the concave groove (21) is biased by the spring (22). The tip of the engagement pin (23) is inserted to prevent the fixed spindle (15) from rotating, and only the axial movement with respect to the main arm (17) is possible.

Further, the fixed spindle (15) has a lock screw (24) penetrating from the side surface thereof, and the polishing tool (14) is detachably fixed to the inner surface of the tip portion. This fixed spindle (1
5) A biasing piston (27), which constantly pushes the ball joint (16) with the biasing force of the pressing spring (25), is slidably mounted inside the fixed spindle to keep the joint shaft (13) moving forward and backward. (15) is surely transmitted.

Further, one piece (30) of the L-shaped swing piece (28) is connected and fixed to the main arm (17) having the fixed spindle (15) mounted thereon, and the other piece positioned at a right angle to the one piece (30). The piece (31) is formed with an elliptical groove (32) whose length direction is parallel to the joint shaft (13). The elliptical groove (32) has a camshaft (3) provided for eccentrically rotating the swing piece (28).
Insert and connect the eccentric rotation part (34) of 3).

As shown in FIG. 3, the eccentric rotating portion (34) is concentric with the concentric circular portion (3) facing both sides of the outer peripheral surface at a position of 180 °.
5) (36) is formed, and this circular center circle (35) (36) is
Form with a width of °. Further, the eccentric rotation portion (34) has a convex portion (37) projecting from the concentric circle at a position 90 ° from the concentric circle portions (35) (36) on the outer peripheral surface. Also from this convex part (37) to 18
A recess (38) is formed at a position of 0 ° so as to be recessed from the concentric circle.

The size of the projection (37) and the size of the recess (38) of the eccentric rotation part (34) are formed so as to be equal to the diameter of the concentric circles at the positions facing each other through the axial center. The eccentric rotation part (34) is surely rotated in the groove (32).

Further, the cam shaft (33) on the side opposite to the eccentric rotation portion (34)
Rotatably supports the end of the cam shaft (33) on the sleeve (41) via the bearing (40) and rotates the cam shaft (33) synchronously with the eccentric shaft (4) via the transmission member (42). It is possible. The transmission member (42) is provided with a pair of timing pulleys (44) on a phase adjustment collar (43) into which the mounting member (5) of the eccentric shaft (4) is inserted in a rotatable and fixed manner.
(45) One timing pulley (44) is connected. In addition, connect the other timing pulley (45) to the camshaft (3
Fix it to the outer circumference of 3), and use this pair of timing pulleys (4
4) (45) are connected with the timing belt (46).

Further, reference numeral (47) in the drawing denotes a front lid body, the upper part of which is fixed to the mounting body (18) by a mounting screw (48) and the fitting recess (50) at the lower end.
The fitting protrusion (51) of the mounting body (18) is fitted and fixed to the.

In the structure configured as described above, when the electric motor (1) is operated to polish the object, the electric motor (1) is operated.
The eccentric shaft (4) connected to the rotary shaft (20) of the
It rotates counterclockwise as shown in the figure. The crankshaft (11) is eccentrically rotated along with the rotation of the eccentric shaft (4), and a joint connected to the crankshaft (11) in a direction intersecting the axial direction of the crankshaft (11). Move back and forth on the axis (13).

Then, the fixed spindle (15) to which the polishing tool (14) is fixed is advanced and retracted in the main arm (17) via the ball joint (16) provided at the tip of the joint shaft (13). The forward / backward movement of the fixed spindle (15) is accompanied by the rotation of the eccentric shaft (4) as shown in the table of FIG.
The amount of forward / backward displacement of the fixed spindle (15) also changes, and when the eccentric shaft (4) makes one rotation, the fixed spindle (15) also makes one reciprocating motion.

Further, the operation of the electric motor (1) causes the cam shaft (33) to move.
Is rotated via the transmission member (42), and the eccentric rotation portion (34) of the cam shaft (33) is eccentrically rotated within the elliptical groove (32) of the swing piece (28) to swing the swing piece ( 28) Pendulum exercise. The pendulum movement of this swing piece (28) causes the joint shaft (1
The main arm (17) connected to the swing piece (28) via 3) is swung about the turning shaft (20) as a fulcrum. As shown in the table of FIG. 5, this swinging motion causes the fixed spindle (15) to swing with the rotation of the cam shaft (33), and when the cam shaft (33) makes one rotation, the fixed spindle is rotated. (15) makes one reciprocating swing motion.

Further, as described above, the fixed spindle (15) is attached to the main arm (17) so as to be able to move forward and backward, so that the polishing tool (14) fixed to the fixed spindle (15) moves forwards and backwards and the forward and backward direction axes. The swinging motion in the intersecting direction is performed at the same time.

Further, the cam shaft (33) has concentric circular concentric portions (35, 36) formed on both sides of the eccentric rotation portion (34), and a convex portion (37) protruding from the concentric circle at one end thereof. A recess (38) recessed from the concentric circle is formed at the other end of the cam shaft (3).
While 3) makes one revolution, the oscillating motion of the fixed spindle (15) makes a resting state twice, causing the polishing tool (14) to draw a lobe-like locus (52) as shown in FIG. It is also possible to do the polishing work according to the purpose.

If the transmission member (42) is formed by a pair of timing pulley and timing belt, the eccentric shaft (4)
The camshaft (33) and the camshaft (33) can rotate in the same direction with a simple mechanism for reliable synchronous rotation.
4) The polishing tool (14) can be operated accurately and the noise can be reduced without causing malfunctions.

Further, if the transmission member (42) is formed of a pair of gears, the eccentric shaft (4) and the cam shaft (33) are opposite to the above,
The polishing tool (14) rotates in synchronism with the opposite direction, and the polishing tool (14) does not cause a malfunction, and enables the polishing tool (14) to operate reliably.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the polishing tool simultaneously performs the forward / backward movement and the forward / backward movement and the intersecting direction. Moreover, since the reciprocating motion and the oscillating motion are synchronously performed by one electric motor, the trajectory of the polishing tool can be set to a shape that intersects the curved line and the linear motion, so that the contact portion of the polishing tool and the object to be polished is partially It is possible to make even contact with the contact part without concentrating on.

Therefore, scratches, uneven wear, etc. are extremely unlikely to occur on the contact portion of the workpiece, and the polishing processing can be performed according to the shape of the polishing portion. Further, since the reciprocating motion and the oscillating motion are possible by one electric motor, the weight and size of the device can be reduced.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a sectional view, FIG. 2 is a sectional view taken along the line AA of FIG. 1 with a front lid removed, and FIG. FIG. 4 is an enlarged front view of the eccentric rotating portion, FIG. 4 is a reciprocating motion curve diagram of the fixed spindle, FIG. 5 is a swinging motion curve diagram of the fixed spindle, and FIG. 6 is a trajectory diagram of the polishing tool. (1) ...... Motor (4) ...... Eccentric shaft (5) …… Mounting member (6) …… Eccentric collar (7) …… Mounting recess (8) …… Inserting recess (11) …… Crank shaft (13 ) …… Joint shaft (14) …… Polishing tool (15) …… Fixed spindle (16) …… Ball joint (17) …… Main arm (18) …… Mounting body (20) …… Rotating shaft (28) ) …… Swing piece (33) …… Cam shaft (34) …… Eccentric rotation part (35) (36) …… Concentric circle part (37) …… Convex part (38) …… Concave part (42) …… Transmission Material (43) …… Phase adjustment collar (44) (45) …… Timing pulley (46) …… Timing belt

Claims (6)

[Claims] 1. An eccentric shaft which is connected to an electric motor to rotate,
The crankshaft is connected so that it can be eccentrically rotated, and a joint shaft is connected to this crankshaft in a direction that intersects with the axial direction of the crankshaft, and the polishing tool is fixed to the joint shaft that moves back and forth as the crankshaft rotates. A fixed spindle for use is swingably connected, and a main arm having this fixed spindle mounted so as to be able to move forward and backward is rotatably connected to the mounting body via a rotary shaft, and the main arm is connected with the rotary shaft. Is connected to and fixed to a swing piece that rotates through the swinging piece, and the electric motor is connected to a cam shaft for eccentrically rotating the swing piece through a transmission member, and the swing piece moves in a pendulum in synchronization with the forward and backward movement of the fixed spindle. An electric polishing device that is characterized by: 2. An eccentric shaft is composed of a mounting member, an eccentric collar rotatably and fixedly inserted into the mounting member, and a phase adjustment collar rotatably and fixedly mounted on the mounting member. The axis of the mounting recess provided on the
The eccentric collar that is formed eccentrically with the shaft center of the mounting member and is inserted into the mounting recess of the mounting member, and the shaft center of the eccentric collar has an insertion recess whose center is eccentric.
The crankshaft is mounted in the insertion recess, and the eccentric amount of the crankshaft can be adjusted by adjusting and rotating the mounting member in the eccentric collar, and the mounting member can be rotated in the phase adjusting collar. 2. The electric polishing apparatus according to claim 1, wherein the phase of the swing piece can be adjusted according to circumstances. 3. The electric polishing apparatus according to claim 1, wherein the joint shaft is rotatably connected to a fixed spindle via a ball joint. 4. The camshaft has concentric circular concentric portions formed on both sides of the eccentric rotation portion, a convex portion projecting from the concentric circle formed at one end, and a concave portion recessed from the concentric circle at the other end. The electric polishing apparatus according to claim 1, wherein the electric polishing apparatus is a machine. 5. The electric polishing apparatus according to claim 1, wherein the transmission member is formed of a pair of timing pulleys and a timing belt. 6. The electric polishing apparatus according to claim 1, wherein the transmission member is formed of a pair of gears.