JP3542969B2 - Polishing method and apparatus for shaft-shaped parts - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention generally relates to a polishing method and apparatus for performing deburring and rounding of a corner edge portion of a shaft-like component having a stepped portion having a different diameter, such as a spool of a hydraulic valve.
[0002]
[Prior art]
Conventionally, polishing such as deburring and rounding of the edge of a cylindrical or cylindrical workpiece (shaft-shaped part) is performed by a rubber roller and a polishing roll brush, and transport is performed by a through feed method in only one direction. Normal.
[0003]
That is, in a conventional through-feed type polishing process, a work (cylindrical / cylindrical shaft-shaped part) conveyed from one side is rotated around a shaft center line by a roll brush, and the work is rotated by a polishing roll brush. Polishing, deburring, rounding, and the like of the edge portion are carried out.
[0004]
[Problems to be solved by the invention]
If it is an ordinary simple cylindrical / columnar shaft-shaped part, grinding can be efficiently performed by a conventional through feed method using a rubber roller and a polishing roll brush as described above. In the case of a shaft-like part with a large diameter part and a small diameter part with a step with a different diameter, such as a spool, with a conventional device using a rubber roller and a polishing roll brush, the transfer can be performed smoothly due to the step of the work. Therefore, the through feed method could not be applied.
[0005]
Therefore, conventionally, an in-feed polishing method has to be adopted for a shaft-shaped component having a step with a different diameter, and an auxiliary device such as a work set for the polishing device is required, and cost reduction is required. There was a problem that it became expensive.
[0006]
An object of the present invention is to solve the conventional problems as described above.
[0007]
[Means for Solving the Problems]
The present invention uses an adjusting roll brush for rotating a shaft-shaped part around its axis center line and a pair of roll brushes opposed to a polishing roll brush for polishing the shaft-shaped part. The shaft-like part is carried in by a feeding device such as an air cylinder and is fed slowly, so that the shaft-like part is polished by a polishing roll brush from a front end to a rear end while being rotated by an adjustment roll brush, and then the feed is performed. By returning the device to the original position, the shaft-shaped part rotates and is automatically polished backward by the polishing roll brush by the return force generated by the inclination angle of the rotation center of the adjusting roll brush with respect to the rotation center of the shaft-shaped part. After rerunning and repeating the slow feeding by the feeder and the self-running return by the adjusting roll brush a plurality of times, the shaft-like part is carried from the pair of roll brushes by the feeder. It is obtained by way.
[0008]
As described above, since the rotation of the shaft-shaped component, the self-running return, and the polishing process are performed by the pair of roll brushes, even if the shaft-shaped component has a step with a different diameter, the shaft-shaped part may hit the stepped portion with the different diameter. There is no obstacle to feeding and returning, etc., the conveyance is extremely smooth, and it is possible to uniformly finish the deburring and rounding of the corner edge of shaft parts with different diameter steps Inexpensive through-feed polishing can be performed.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a schematic explanatory view showing an example of a through-feed type polishing apparatus to which the present invention is applied. 1 is an adjusting roll brush, 2 is a polishing roll brush, 3 is a work guide, 4 is a claw portion 5 at the tip of a piston rod. The work 8 carried in from the carry-in conveyor 6 is guided by the work guide 3, and is controlled by the air cylinder 4 from a pair of roll brushes of the adjusting roll brush 1 and the polishing roll brush 2 facing each other. The work 8, which has been sent to the polishing section and polished by the polishing section, is carried out to the carry-out conveyor 7 by the air cylinder 4. The adjustment roll brush 1 is driven to rotate by a drive motor 9, and the polishing roll brush 2 is driven to rotate by a drive motor 10.
[0011]
The air cylinder 4 is of a two-stage speed switching type of a fast feed and a slow feed (cutting feed), and the above switching is performed by an auto switch.
[0012]
The work 8 is, as illustrated in the figure, a shaft-shaped component having a large-diameter portion, a small-diameter portion, and the like, and having steps of different diameters.
[0013]
Of the pair of roll brushes, the adjusting roll brush 1 is a roll brush mainly for rotating the work 8, but the work 8 is also polished by using a brush containing abrasive grains. The polishing roll brush 2 is a roll brush containing abrasive grains, and rotates at a high speed to polish the work 8 to perform deburring and rounding of a corner edge portion.
[0014]
As shown in FIG. 1B, the adjustment roll brush 1 has a rotation center line YY having an inclination angle θ with respect to an axis center line XX of the work 8 fed and guided by the work guide 3. In addition, by rotating the work 8 about its axis center line XX by rotating it in contact with the work 8 at the inclination angle θ, a return force F is applied to the work 8 in the backward direction (the carrying direction). I have.
[0015]
The polishing roll brush 2 is mounted such that its rotation center line is parallel to the axis center line XX of the work 8.
[0016]
The work guide 3 is formed, for example, by combining a part as shown in FIG. 3 and a part symmetrical to the left and right side in parallel with a predetermined gap to form a substantially V-shaped part having a predetermined gap at the center as shown in FIG. As shown in FIG. 5, a structure having a carry-in portion 31 of a mold groove and a polishing guide portion 33 (having a predetermined gap at least below the center) having a work fitting portion 32 having a substantially rhombic shape at both ends as shown in FIG. The tip claw portion 5 at the tip of the piston rod of the air cylinder 4 can be slidably inserted into a gap formed below the center from the transport portion 31 to the polishing guide portion 33, and is thereby fed into the work guide 3. The tip claw 5 is engaged with the rear end of the work 8 so that the work 8 can be sent in the unloading direction by the contraction operation of the air cylinder 4.
[0017]
Hereinafter, the polishing operation of the shaft-shaped component will be described with reference to FIG.
[0018]
First, the work 8 carried in by the carry-in conveyor 6 is pushed by the tip claw portion engaged with the work rear end face by the rapid feed operation of the air cylinder 4 of the two-stage speed switching type, and the pair of roll brushes 1, 2. Fast forward to 2 copies. Next, from there, the work 8 is slowly fed forward (in the unloading direction) through the pair of roll brushes 1 and 2 by the slow feed operation of the air cylinder 4, while the work 8 is rotated by the adjustment roll brush 1 so that the center of the shaft is rotated. Polishing is performed by rotating the polishing roll brush 2 while rotating about the line XX. Then, when the air cylinder 4 is temporarily stopped and then extended (returned) to a predetermined position (a position where the rear end portion of the work 8 is polished), the tip claw portion 5 is brought into contact with the roll brush 1. , Return to the position where it engages with the rear end of the work before entering the second part, and waits there.
[0019]
Then, the work 8 is still being polished by the polishing roll brush 2 while being rotationally driven by the adjusting roll brush 1, but is not restricted by the tip claw portion 5 at the rear end of the work 8. The work 8 self-runs in the return direction due to the return force F generated by the inclination angle θ of the rotation center Y-Y of the adjusting roll brush 1 with respect to XX, and the rear end of the work 8 moves to the standby front claw 5. It returns while being polished to the point where it comes into contact.
[0020]
Then, the air cylinder 4 is actuated again to delay the work 8 forward, the rotation of the work 8 by the adjusting roll brush 1 and the polishing by the polishing roll brush 2 are performed, and the same operation as described above is repeated.
[0021]
In this manner, after the air cylinder 4 repeats the slow feeding by the air cylinder 4 and the self-running return by the inclination angle θ of the adjusting roll brush 1 an appropriate number of times, the air cylinder 4 operates to the forward end and the workpiece 8 Is pulled out (fast-forwarded) from the first and second roll brushes and carried out by the carry-out conveyor 7.
[0022]
As described above, the slow feeding by the air cylinder 4 and the self-propelled return by the adjusting roll brush 1 are repeated several times, and the polishing by the polishing roll brush 2 is continued during that time, whereby the workpiece as a shaft-shaped part having a step with a different diameter is obtained. Deburring and rounding of the corner edge portion of No. 8 can be performed uniformly and finished accurately. In the above-described polishing operation, the pair of roll brushes 1 and 2 are configured to rotate, self-run, and polish the work 8, so that even if the work 8 is a shaft-shaped component having a step with a different diameter. In addition, there is no problem in feeding or returning by hitting the stepped portion having a different diameter, and the conveyance is carried out extremely smoothly, so that an efficient and inexpensive through-feed polishing can be performed.
[0023]
In the above description, the number of rotations of the adjusting roll brush 1 for mainly rotating and driving the work 8 is set to be lower than that of the high-speed polishing roll brush 2 for polishing, but the self-propelled return speed of the work 8 is set. Is substantially determined by the rotation speed of the adjustment roll brush 1 and the inclination angle θ, it is preferable that the rotation speed of the adjustment roll brush 1 be appropriately adjusted according to the desired self-running return speed of the work.
[0024]
In the above-described embodiment, an example in which the air cylinder 4 is used as the feed device for the work 8 is described. However, the present invention is not limited to the air cylinder, and any conventionally known feed device can be used.
[0025]
As described above, the polishing method and apparatus according to the present invention are capable of performing polishing processing such as deburring and rounding of a corner edge portion of a shaft-like component having a stepped portion having a different diameter such as a spool of a hydraulic valve. However, it is needless to say that the present invention is not limited to this, and can be applied to polishing of a simple shaft-like part having a cylindrical or columnar shape without a stepped portion.
[0026]
【The invention's effect】
As described above, according to the present invention, for example, a polishing process such as deburring and rounding of a corner edge portion of a shaft-shaped component having a stepped portion having a different diameter like a spool of a hydraulic valve can be smoothly performed by a through feed method. In addition, the polishing can be performed uniformly, so that the efficiency of the polishing operation can be greatly increased, the cost can be reduced, and a great effect can be obtained in practical use.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, in which (A) is a schematic explanatory view showing an example of a through-feed type polishing apparatus to which the present invention is applied, and (B) is a view taken along the line AA of (A). The figure shows the relationship between the rotation direction of the adjustment roll brush and the rotation direction of the work.
FIG. 2 is an operation explanatory view showing an example of a polishing method according to the present invention.
FIG. 3 is a perspective view showing an example of a part (one half) constituting the work guide of FIG. 1;
4 is a cross-sectional view of a loading section (BB section in FIG. 3) of the work guide in FIG. 1;
FIG. 5 is a cross-sectional view of a work fitting portion (CC portion in FIG. 3) of the work guide in FIG. 1;
[Explanation of symbols]
REFERENCE SIGNS LIST 1 adjustment roll brush 2 polishing roll brush 3 work guide 4 air cylinder 5 tip claw section 6 carry-in conveyor 7 carry-out conveyor 8 work 9 drive motor 10 drive motor 31 carry-in section 32 work fitting section 33 polishing guide section

Claims (2)

The shaft-like part is carried by a feed device such as an air cylinder into a pair of opposing roll brush parts of an adjustment roll brush for rotating the shaft-like part around its axis and a polishing roll brush for polishing the shaft-like part. By slow feeding, the shaft-shaped part is polished by the polishing roll brush from the front end to the rear end while being rotated by the adjusting roll brush, and then the shaft is returned by returning the feeder to the original position. Due to the return force generated by the inclination angle of the rotation center of the adjusting roll brush with respect to the rotation center of the shaft-shaped component, the shaft-shaped component rotates and self-runs backward while being polished by the polishing roll brush. The self-propelled return by the roll brush is repeated a plurality of times, and then the shaft part is carried out from a pair of roll brush parts by a feeder. Method. A work guide for guiding the shaft-shaped part so as to be rotatable about the axis and movable in the axial direction, and adjusting roll brushes installed opposite to each other so as to sandwich the shaft-shaped part guided by the work guide A pair of roll brushes and a polishing roll brush, and a polishing device for a shaft-shaped component including a feed device such as an air cylinder that conveys the shaft-shaped component guided by the work guide from the loading side to the unloading side, The adjusting roll brush has a rotation center having an inclination angle with respect to the axis of the shaft part guided by the work guide, and the rotation of the adjusting roll brush drives the shaft part to rotate around its axis. Rutotomoni being adapted to be able to self return the shaft-like part to the carry-in side by the inclination angle, the slow feed and adjustments to the carry-out side by the feeding device such as the air cylinder The self-propelled return to the carry-in side due to the inclination angle of the rotation center of the roller brush is alternately repeated, and during this time, the shaft part is polished by the polishing roll brush. Polishing equipment.

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