JPS6250266B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copy polishing device that is particularly suitable for polishing grooves in molds.

A copy polishing device is generally constructed as shown in FIG. The frame 33 includes a lower member 33a having a hemispherical seat 5, an upper plate 33b, and a side member 33c connecting the lower member 33a and the upper plate 33b. Support member 3
2 is attached to the lower surface of the lower plate 32a to which the electric motor 3 is attached, and has a spherical part 34 on the outer periphery and a bearing 3 on the inner periphery.
5, a top plate 32c with a conical groove 36 formed in the upper part, and a side member 32d that connects the bottom plate 32a and the top plate 32c. In this way, the spherical part 34 of the support part 32b is tiltable with respect to the hemispherical seat 5 and is engaged with the hemispherical seat 5 so as to be able to move slightly upward, so that the support member 32 is also tiltable with respect to the frame 33. , and is supported for fine movement. The output rotating shaft 19 of the electric motor 3 is rotatably supported by the support portion 32b by a bearing 35, and is formed so that the shaft portion of the polishing member 2 can be detachably attached to the lower end thereof. compression spring 4
The bottom plate 32a of the support member 32 and the frame 3
The compressed spring force is balanced with the weight of the support member 32 including the electric motor 3. frame 33
A bearing member 7a is provided at the center of the top plate 33b. Further, above the top plate 33b, there is installed a bracket 33d in the shape of an image that presses the lower end of the spring 10, and a bracket 33 in the shape of a square that presses the upper end of the spring 11 on the top of the bracket 33d.
e is installed. The displacement detection shaft 8 is connected to the bearing member 7
It is supported slidably in the vertical direction by a linear ball bearing 7 attached to a. A steel ball 6 is sandwiched between a conical groove 37 formed at the lower end of the displacement detection shaft 8 and a conical groove 36 fixed to the upper plate 32c of the support member 32, and the steel balls 6 are interlocked. A load applying means is provided at the upper part of the displacement detection shaft 8 for applying a constant load in a downward direction to the polishing member 2 via the support member 32. Load adjustment nut 1
2, and springs 11 and 10 installed above and below the load adjusting nut 12 and between the bracket 33e and the bracket 33d. The detector 9 is connected to the support member 32
The detection means detects the amount of tilting and the amount of movement in the vertical direction, and detects the vertical displacement of the displacement detection shaft 8 with respect to the reference position when a reference polishing load is applied to the polishing member 2. It is installed in That is, when the support member 32 is slightly tilted, the conical groove 3
The axial center of the conical groove 36 deviates from the axial center of the conical groove 36, pushing up the displacement detection shaft 8 through the steel ball 6. Also, when the support member 32 rises slightly, the displacement detection shaft 8 is pushed up, and the detector 9 The amount of push up of the displacement detection shaft 8 is detected. Further, the support portion 32 of the support member 32
A mounting bracket 17 is fastened to the lower end of b to provide a packing 38 to prevent polishing debris from entering the bearing 35.

Therefore, when the polishing member 2 is pressed against the machined surface of the workpiece 1 and the workpiece 1 is moved in the horizontal direction as shown by the arrow, the polishing member 2 is moved according to the shape of the machined surface of the workpiece 1. In response to the reaction force, the support member 32 slightly tilts or moves slightly in the vertical direction. This gives vertical movement to the displacement detection shaft 8 via the conical groove 36, the steel ball 6, and the conical groove 37, and this displacement detection shaft 8
The detector 9, which is a detection means, detects the movement in the vertical direction with respect to a reference position (a reference position at which the load applied by the load application means 10 to 12 shows a predetermined value). Based on the detection signal obtained from the detector 9, the head A and the workpiece 1 are controlled vertically relative to each other, and the polishing member 2 is rotated by the electric motor 3.
In this case, the surface of the mold, which is the workpiece 1, is polished by self-guided profiling.

However, since the above-mentioned copy polishing device polishes by rotating the polishing member 2 to imitate the shape of the machined surface of the workpiece 1, the circumferential speed between the center and the outer periphery of the polishing member 2 (the outer periphery As a result, the wear of the polishing member 2 is significantly greater at the outer peripheral portion. In this conventional copy polishing device, the polishing amount and wear differ depending on the peripheral speed of the polishing member 2.
For example, when polishing the bottom surface 14 of a groove 13 as shown in FIG. 2, the center and both sides of the groove 13 in the width direction have different roughness, making it difficult to polish uniformly. Therefore, it is conceivable to stop the rotation of the polishing member 2 and polish by only feeding in the direction of the arrow, but in this case, since the feed rate is limited, there is a problem that the polishing rate drops to less than one-tenth. Was.

In view of the problems of the prior art described above, an object of the present invention is to obtain uniform polishing amount and wear simply by replacing the attachment, and to uniformly polish flat surfaces such as the bottoms of directional grooves. To provide a copy polishing device capable of copy polishing.

That is, in order to achieve the above object, the present invention has the following features:
a frame; a lower support part is supported at the lower end of the frame so that it can be tilted and moved slightly in the vertical direction; a support member attached to the frame, a displacement detection shaft supported slidably up and down on the upper part of the frame, a conical groove formed at the upper end of the support member and the lower end of the displacement detection shaft, and a space between these conical grooves. Applying a constant pressure to the displacement detection shaft in order to apply a constant load downward to the polishing member through the engagement means for engaging the two with the interposed steel ball, and the displacement detection shaft and the support member. A head is equipped with a load applying means for detecting the amount of tilting of the supporting member and a detecting means for detecting the displacement of the displacement detection shaft to detect the amount of tilting and fine movement in the vertical direction. The polishing member is moved in the horizontal direction, and the workpiece and the head are controlled to follow up and down relative to each other based on the displacement signal of the displacement detection axis detected by the detection means of the head. A self-guided profiling polishing device that polishes a surface by tracing the surface, includes a main body attached to a mounting bracket attached to the lower end of the support part of the support member, and a main body rotatably supported by the main body and the upper end is rotated by the output rotation of the electric motor. a rotating shaft connected to the shaft and having an eccentric shaft at the lower end;
Further, an attachment consisting of a reciprocating piston that reciprocates and is connected to an eccentric portion at the lower end of the rotating shaft and a polishing member that is attached downward to the reciprocating piston is attached to and detached from the lower end of the support portion of the support member. The support member and the electric motor attached to the support member are configured to be freely attached.
This copy polishing device is characterized in that a spring is interposed between the frame and the support member so that the pressure can be adjusted to support the load of the attachment and the like.

Hereinafter, a third embodiment of the copy polishing device of the present invention will be described.
This will be explained based on the drawings and FIG. That is, the copy polishing device of the present invention has a head A and an attachment B.
It consists of

A mounting flange 17 is fastened to the lower end of the support portion 32b of the support member 32 of the head A.

On the other hand, as shown in FIG. 3, the attachment B includes a main body 16 which is removably fastened by bolts 18 to a mounting flange 17 fastened to the lower end of the support portion 32b of the support member 32; The upper end shaft portion 20a is inserted into a hole 39 drilled at the lower end of the output rotating shaft 19 that protrudes downward from the flange 17, and is fixed with a rotation stopper bolt 21, and the central shaft portion 2
0b is rotatably supported by a bearing 40, and the lower end eccentric shaft 20c is eccentrically formed with respect to the central shaft portion 20b. The eccentric shaft 2 is rotatably supported by a bearing 41 at a position eccentric from the center of the central shaft portion 20b.
2, a crank 23 whose one end is fixedly attached to the lower end of the eccentric shaft 22, and a spherical part 24 provided at the other end of the crank 23 are rotatably connected, and the main body 1
A reciprocating piston 25 is provided on the left side of the lower end of the piston 6 so as to be slidable left and right. Further, a shaft 26 having a polishing member 27 attached to its lower end is attached to the left end of the reciprocating piston 25.

In this way, the main body 16 is attached to the mounting flange 17.
The attachment B is attached to the head A by further inserting the upper end shaft portion 20a of the rotating shaft 20 into the hole 39 of the output rotating shaft 19 and fixing it with the rotation stopper bolt 21. Then, the electric motor 3 is rotationally driven to rotate the rotating shaft 20 at high speed through the output rotating shaft 19 using the bearing 40 as a guide, and the axis of the eccentric shaft 22 is eccentrically rotated at high speed together with the lower end eccentric portion 20c of the rotating shaft 20. , the polishing member 27 is caused to reciprocate, ie, vibrate, at high speed in the direction of the arrow via the reciprocating piston 25. Further, the head A and the workpiece 1 are moved relative to each other in the vertical direction, and the polishing member 27 is brought into contact with the bottom surface 14 in the groove 13 of the workpiece 1 and moved along the groove. Then, the head A and the workpiece 1 are controlled vertically relative to each other by the signal from the detector 9 so that the load applied to the workpiece 1 by the polishing member 27 is constant, and the groove 13 of the workpiece 1 is The polishing member 27 performs self-guided profiling polishing along the bottom surface of the groove and the polishing member 27 along the groove direction.
The reciprocating motion (vibration) allows the bottom surface of the groove to be uniformly polished to a mirror-like finish. That is, the polishing member 27
By reciprocating (vibrating) along the groove direction, the polishing speed of the polishing member 27 is made uniform and the bottom surface of the groove is polished, and the polishing member is uniformly polished in the width direction of the groove without uneven wear. be able to. Furthermore, when polishing a relatively flat surface other than a groove, the following ability of the polishing member is not required so much, so that it is possible to follow and polish even with the polishing member 27 that moves reciprocatingly. Further, when polishing is performed with the reciprocating polishing member 27, the polishing speed becomes uniform as described above.
It is possible to polish with higher precision than conventional rotary polishing members.

On the other hand, a normal mold has a three-dimensional free-form surface that is inclined. When polishing such a mold, a polishing member 27 is attached with attachment B and moves back and forth.
If the polishing is done with a polishing method, the followability is slower than the period of the reciprocating motion, so the curved surface cannot be followed, and it becomes impossible to polish uniformly. Therefore, attachment B
Remove the output rotating shaft 19 as shown in Figure 1.
If polishing is performed by attaching the polishing member 2 directly to the hole 39 bored at the lower end of the polishing member, there is no problem with followability since the polishing member 2 does not move at high speed. Therefore,
According to the conventional technique shown in FIG. 1, it is possible to polish a three-dimensional free-form surface that is inclined to some extent.

In this way, the attachment B can be removed and the polishing member 2 can be directly attached to the output rotating shaft 19 so that the reciprocating polishing member or the rotary polishing member can be selected depending on the shape of the surface to be polished. That is, the main body 16 of attachment B is attached to the head A.
is removably attached to the mounting flange 17 of the attachment B with bolts 18, and is further attached to the rotation shaft 20 of the attachment B.
is configured so that it can be detachably connected to the output rotating shaft 19 of the electric motor 3 of the head A with a rotation stopper bolt 21.

Furthermore, if attachment B is attached, the polishing load will increase by the weight of attachment B. In order to eliminate this increase in polishing load, the fourth
It was configured as shown in the figure. That is, FIG. 4 is an enlarged sectional view showing the lower part of the head A, and the difference from the head A shown in FIG.
A spring 4 is interposed between the ring 29 and the lower plate 32a of the support member 32, and an adjustment bolt 31 is provided on the lower member 33a.
The polishing load is adjusted by moving the spring 9 up and down in the guide groove 30 to adjust the amount of deflection of the spring 4. When the attachment B is attached, the ring 29 is raised by the adjustment bolt 31 to bend the spring 4, and the adjustment is made so as to cancel out the increase in the polishing load corresponding to the weight of the attachment B.

On the other hand, if the attachment B is removed and the polishing member 2 is directly attached to the output rotating shaft 19, it is necessary to lower the ring 29 using the adjustment bolt 31 to reduce the compressive force of the spring 4. In this way, variations in the weight of the support member 32 and everything attached to the support member affect the polishing load and thus the polishing accuracy. Therefore, by adjusting the compressive force of the spring 4, the polishing load can be appropriately adjusted for both polishing by rotational motion as shown in FIG. 1 and polishing by vibration as shown in FIG.

Incidentally, slight adjustment of the polishing pressure is performed by adjusting the position of the nut 12.

As explained above, the copy polishing device of the present invention has the following features:
Attachment B, which has a built-in mechanism for converting rotational motion into reciprocating motion, is removably attached to head A.
The polishing member of attachment B is reciprocated at high speed.
In other words, it is configured to perform self-guided profiling polishing through vibration, so that not only the bottom surface of directional grooves but also the flat bottom surface can be polished more uniformly and mirror-finished compared to conventional rotary systems. Furthermore, the polishing time is also advantageous in that it can be polished at a high speed similar to the conventional method.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of the head of a conventional copy polishing device, Fig. 2 is an explanatory diagram showing the case where grooves are polished by the conventional copy polishing device, and Fig. 3 is an illustration of a copy polishing device of the present invention. FIG. 4 is an enlarged sectional view showing the lower part of the head of the scanning polishing apparatus of the present invention. A...Head, B...Attachment, 1...Mold,
3... Electric motor, 13... Groove, 14... Bottom part, 16... Main body, 19... Output rotating shaft, 20... Rotating shaft, 22... Eccentric shaft, 23... Crank, 25... Reciprocating piston, 2
7... Polishing member.

Claims (1)

[Claims] 1 A frame, and a lower support part is supported at the lower end of the frame so as to be tiltable and movable in the vertical direction, and an electric motor is mounted on the upper part with its output rotating shaft passing through the support part and directed downward. a support member attached to the frame, a displacement detection shaft supported slidably up and down on the upper part of the frame, a conical groove formed at the upper end of the support member and the lower end of the displacement detection shaft, and a space between these conical grooves. Applying a constant pressure to the displacement detection shaft in order to apply a constant downward load to the polishing member through the engagement means for engaging the two with an interposed steel ball, and the displacement detection shaft and the support member. A head is provided, which is equipped with a load applying means for detecting the amount of slight tilting and a slight amount of movement in the vertical direction of the supporting member, and a detection means for detecting the displacement of the displacement detection shaft, and the workpiece and the head are connected to each other. The abrasive member is moved relatively horizontally, and the workpiece and the head are relatively controlled vertically to track the workpiece based on the displacement signal of the displacement detection axis detected by the detection means of the head. A self-guided profiling polishing device that polishes by following the surface of the support member, the main body is attached to a mounting bracket attached to the lower end of the support part of the support member, and the upper end is rotatably supported by the main body and connected to the output of the electric motor. a rotating shaft connected to the rotating shaft and having an eccentric shaft at its lower end; a reciprocating piston supported by the main body so as to be slidable in the horizontal direction and connected to the eccentric portion at the lower end of the rotating shaft; An attachment consisting of a polishing member attached downward to the reciprocating piston is configured to be removably attached to the lower end of the support part of the support member, and further includes the support member and the electric motor attached to the support member. , a copy polishing device characterized in that a spring is interposed between the frame and the support member so that the pressure can be adjusted to support the load of the attachment, etc.