JPH08229783A - Abrasive device - Google Patents

Abstract

PURPOSE: To polish a bar-shaped body efficiently along an axial direction by providing a longitudinally moving drive source of longitudinally moving a workpiece and an abrasive member relatively in a workpiece axial direction, and providing an abrasive member drive source of intermittently moving the workpiece intermittently turning drive source abrasive member along a periphery of the workpiece. CONSTITUTION: When an operating command is generated, the first/second rotation drive sources 6, 16 are rotated at a fixed angle and stopped. This stop signal is received, and a slide device 3 is actuated to start longitudinally moving a mounting base 2. By longitudinally moving this mounting base 2, a workpiece W is polished in the lengthwise direction by an abrasive member. Here is stopped the mounting base 2 when polished for a fixed time, and by this stop signal, the first/second rotation drive sources 6, 16 are again rotated at a fixed angle. By repeatedly performing operation thus obtained, the workpiece W is polished in its total surface in the lengthwise direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for polishing a rod-shaped body along an axial direction, and particularly for polishing a core pin which is one component of a mold used for molding an injection molded product. A suitable polishing device.

[0002]

2. Description of the Related Art A work is fixed to a rotating device such as a lathe,
A method is known in which sandpaper, which is a polishing member, is pressed while rotating the work, and polishing is performed so that the surface becomes a mirror surface. This is a polishing method particularly effective for a work having a circular cross-section. Further, in the case where the cross-sectional shape of the work is non-circular (for example, elliptical or quadrangular), a method of fixing the work and polishing each surface of the work with a rotating sander or the like is also adopted.

[0003]

However, in the former case of the above-mentioned prior art, there is a limit to what the surface is mirror-polished, and a minute streak-like scratch is formed in the rotating direction of the work. Further, in the latter case, since it is partially polished, minute scratches are formed in irregular directions. here,
A core pin will be described as an example of the work. It is a part of a mold used for injection molding and the like. After the completion of molding, the core pin slides out on the inner surface of the molded product when the mold is opened. At this time, the molded product firmly holds the core pin by the pressure of the resin, the contracting force when the resin is solidified, and the like. If you use the core pin processed by the above method, the resin will flow into minute scratches on the circumference,
Furthermore, the core pin was hard to come off from the molded product.

Therefore, it was considered to move the polishing member in the longitudinal direction of the core pin (in the direction away from the molded product), but there is no such device, and after all, the core pin is fixed and the polishing member is manually moved in the longitudinal direction. I was polishing Therefore,
This was the cause of poor productivity of core pins and expensive molds.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to attach a base to which a gripping member for detachably gripping a work is attached and a polishing member for abutting the outer periphery of the work. And a frame, the polishing member is arranged so that the polishing member abuts on the outer peripheral surface of the workpiece, and the back-and-forth drive source for moving the workpiece and the polishing member back and forth relatively in the workpiece axial direction, and the workpiece intermittent rotation drive source polishing member. It is characterized in that a rod-shaped body provided with a polishing member drive source for intermittently moving the workpiece along the outer circumference of the workpiece is polished along the axial direction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment will be described with reference to FIGS.
A mounting table 2 as shown in FIG. 3 is fixed to an upper surface of the base 1 on a slide device 3 that moves only in one axis direction. In this slide device 3, the mounting table 2 can be moved back and forth by the rotation of the ball screw shaft 4. Of course, the ball screw shaft 4 is rotated by the rotary drive source 6,
The rotary drive source 6 can be arbitrarily rotated (normal rotation, reverse rotation) and stopped by a general control method. On the upper surface of the mounting table 2 described above, a chuck device 5 that holds the work W and can be opened and closed.
The first rotary drive source 6 for rotating the chuck device 5 is fixed. In this embodiment, the first rotary drive source 6 and the chuck device 5 are connected via the coupling 7, but the chuck device 5 may be directly fixed to the first rotary drive source 6. . Reference numeral 8 is a bearing for supporting the chuck device 5 interposed between the chuck device 5 and the first rotary drive source 6. The action of force on the first rotary drive source 6 in the direction of gravity is prevented as much as possible.

A plate 9 is fixed on the side surface of the base 1 in front of the chuck device 5. The plate 9 is provided with a fixing plate 10 bent in an L-shape and bolts 11 and 12.
Has been fixed by. The through hole 13 of the bolt 12 for fixing the upper part of the fixing plate 10 is formed as a long hole, and by loosening the bolt 11, the fixing plate 10 can be fixed by tilting the fixing plate 10 in the front-back direction. it can. Reference numeral 14 is an angle stamped on the side surface of the plate 9, and the inclination angle of the fixed plate 10 is set with this angle 14 as a guide.

A pulley 15 is rotatably attached to the front surface of the fixed plate 10, and the pulley 15 is connected to an output shaft of a second rotary drive source 16 attached to the rear surface of the fixed plate 10. There is. In the present embodiment, the pulley 15 and the output shaft of the second rotary drive source 16 are connected via the coupling 7, but the pulley 15 may be directly attached to the output shaft. Further, although the second rotary drive source 16 is fixed to the fixed plate 10 via the pipe members 17 and 18, the second rotary drive source 16 may be directly fixed to the fixed plate 10.

Below the front surface of the fixed plate 10, angle adjusting plates 20 to which pulleys 19 are attached are attached at positions facing each other. The angle adjusting plate 20 has a long hole 21.
Is formed, and the angle adjusting plate 20 is moved and adjusted within the range of the elongated hole 21. As the fixing method, bolts 22 are used in this embodiment. Reference numeral 23 is a tension adjusting device for adjusting the tension of the polishing member, which is constantly urged downward by a spring or the like (see FIG. 2). Further, 24 is a polishing member such as sandpaper, which is wound around the work W as well as the pulley 15, the pulley 19 and various pulleys 25. Reference numeral 26 is a pressing device for preventing the polishing member 24 from coming off from the pulley 15 and the like, and is constituted by pressing the pressing pulley 27 against the pulley 15. That is, the polishing member is held by the pulley.

Next, a method of setting each drive source before operation will be described. First, the bolts 22 fixing the angle adjusting plate 20 are loosened to be in a free state. Next, the work W is fixed to the chuck device. Next, the polishing angle of the fixed plate 10 is set and the bolts 12 are tightened to securely fix the fixed plate 10. Next, the angle of the angle adjusting plate 20 and the position in the height direction are set in consideration of the winding angle of the polishing member 24 around the work W, the tension, and the like, and the bolts 22 are fixed. Next, the moving range of the mounting table 2 of the slide device 3 and the center position of the moving range are set. Further, the interval of intermittent rotation of the first rotary drive source 6 and the second rotary drive source 16 is also set. The setting of the intervals of these intermittent rotations is generally performed using a timer. Also in this embodiment, the timer is set to be used.

After setting the above, the device is operated. When the operation command is issued, the first rotary drive source 6 and the second rotary drive source 16 rotate by a certain angle and stop. Upon receiving this stop signal, the slide device 3 operates and the mounting table 2 starts moving back and forth. The work W is polished in the longitudinal direction by the polishing member 24 by the back-and-forth movement of the mounting table 2. When the polishing table is polished for a certain period of time, the mounting table 2 stops, and the stop signal causes the first
The rotary drive source 6 and the second rotary drive source 16 rotate again by a constant angle. By repeating such an operation, the entire surface of the work W is polished in the longitudinal direction (see FIG. 4).

A ring member 28 is detachably fixed to the pulley 25 and the like in this embodiment with bolts 29, and the width H of the pulley can be adjusted according to the width of the polishing member 24 used. There is. A ring member 30 is also detachably attached to the pressing pulley 27.

FIG. 6 shows a second embodiment of the present invention. The description of the same configuration as that of the first embodiment will be omitted. Mounting table 2
This is a change in the way of moving. A sliding block 31 is fixed on the upper surface of the base 1, and the sliding rod 3 is attached to the sliding block 31.
2 is slidably attached, and the mounting table 2 is connected to the sliding rod 32. On the other hand, a first rotary drive source 35 having a disk 34 having a plurality of holes 33 having different major axes is arranged behind the base 1. Then, one of the holes 33 and the mounting table 2 are connected by a crank bar. The moving range of the mounting table 2 can be set by appropriately selecting the hole 33. The first rotary drive source 35 is arranged so as to be movable back and forth with respect to the base 1 by a rack and pinion mechanism or the like. The position of the first rotary drive source is set by rotating the handle 36 left and right. The second embodiment can be manufactured at a lower cost than the first embodiment.

FIG. 7 shows a third embodiment of the present invention. The chuck 9 and the first rotary drive source 6 are fixed to the base, and the plate 9 to which the second rotary drive source 16 for intermittently moving the polishing member 24 in the circumferential direction is attached can be moved back and forth in the axial direction of the work. The slide device 3 is fixed to the mounting table 2. That is, the polishing member side can be moved back and forth in the axial direction of the work. By allowing the polishing member side to move back and forth, the holding mechanism 37 that holds the end of the work W (the end opposite to the chuck device 5) can be arranged on the base 1. When polishing a thin and long work (such as the core pin mentioned in the prior art), it is possible to prevent the vicinity of the end of the work from dripping due to its own weight or the biasing force of the polishing member, and it is possible to polish accurately and accurately. it can. In this embodiment, a hole is formed in the side surface of the end of the work W and the holding pin is inserted into the hole 38 to hold the work W. However, the other end of the work may be held in the same manner as the chuck device 5. .

[0015]

According to the present invention, the polishing member is attached to the outer peripheral surface of the work, and the base is provided with the holding member for detachably holding the work, and the frame is provided with the polishing member for abutting the outer periphery of the work. A front-rear drive source that is disposed so as to be in contact with each other and that relatively moves the work and the polishing member back and forth in the work axis direction, and a work intermittent rotation drive source A polishing member drive that intermittently moves the polishing member along the outer periphery of the work. Since the rod-shaped body provided with the source is polished along the axial direction, the productivity of the work can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a left side view of FIG.

3 is a partially cutaway external perspective view of the slide device of FIG. 1. FIG.

FIG. 4 is an operation chart of the first embodiment of the present invention.

FIG. 5 is a top view of FIG.

FIG. 6 is a front view of a second embodiment of the present invention.

FIG. 7 is a front view of a third embodiment of the present invention.

[Explanation of symbols]

 1 base 2 mounting table 3 slide device 4 ball screw shaft 5 chuck device 6 rotation drive source 9 plate 10 fixing plate 14 angle 15, 19, 25 pulley 16 rotation drive source 20 angle adjusting plate 24 polishing member 27 pressing pulley 31 sliding Block 32 Sliding bar 35 Rotational drive source 36 Handle 37 Holding mechanism

Claims (1)

[Claims] 1. A base, to which a gripping member for detachably gripping a work is attached, and a frame, to which a polishing member is attached, which contacts the outer periphery of the work, are arranged so that the polishing member abuts on the outer peripheral surface of the work. And a back-and-forth drive source for moving the work and the polishing member relative to each other in the axial direction of the work, and a polishing member drive source for intermittently moving the work rotation drive source polishing member along the outer periphery of the work. A polishing device characterized by polishing a rod-shaped body along an axial direction.