JPS604700Y2 - polishing tools - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in abrasive tools.

Processing such as deburring the cylindrical member is usually done manually using a file and a sharpener.

Attempts have been made to mechanize this manual work, but in the case of mechanization, the machining tools would have to be changed for each different diameter.
Furthermore, when processing both ends, there is a drawback that setup changes are required each time one is processed.

It has also been considered to perform machining of different diameters with a single machining tool, but in this case, if the diameter changes, the contact condition between the tool and the workpiece changes and the quality of machining cannot be the same. be.

The present invention was developed based on the above-mentioned circumstances. A rod-shaped elastic member is attached to the end of each leg of a pair of adjustable legs, and a spherical abrasive member is attached to the tip of this elastic member. This facilitates polishing of cylindrical members.

Hereinafter, the present invention will be described based on embodiments with reference to the drawings.

As shown in FIGS. 1 and 2, the polishing tool has a pair of lever-shaped legs 1, 1, and these legs 1.1 are provided on the axis of the rotating shaft 2. It is rotatably engaged with a bolt 3 and fixed to the rotating shaft 2 with a nut 4.

Further, adjusting screws 5 having reverse threads on both sides are screwed into these leg parts 1, 1 in order to adjust the opening of the legs.

This screw 5 has a spanner hook 5as at its center and a stopper 5b at both ends, and when the screw 5 is rotated forward and backward, the leg portions 1.1 move at equal angles from the axis of the rotating shaft 2 with the bolt 3 as the intersection point. It can be opened and closed.

Open leg end portion 1a of each of the leg portions 1,1. A pair of cylindrical elastic members 7, 7 are detachably attached to 1a by machine screws 6.

However, the elastic members 7, 7 as levers are replaced by abrasive members 8, 8, which will be described later.
The material has elasticity such that the relationship between the pressing force and the amount of displacement against the workpiece is suitable for processing.

A spherical abrasive member 8.8 having a larger diameter than the cross-sectional size of the elastic members 7.7 is attached around the tips of the elastic members 7,7.

The polishing members 8, 8 may have a rough ball shape as shown in FIG. 3, and have a constant arc R around the axis of the elastic member 7.

These polishing members 8, 8 may be made of any material such as a grindstone or electrodeposited diamond.

In this way, the polishing tool is configured such that the opening of the legs can be adjusted by means of the adjusting screw 5, and the center-to-ball dimension of the polishing member 8 can be adjusted.

Next, regarding machining, the rotating shaft 2 of the polishing tool is attached to, for example, a drilling machine, and the cylindrical member W of the workpiece is fixed on the axis of the drilling machine as shown in FIG.

To process the large side (Figures 1 and 4), first loosen the nut 4 to make the legs 1, 1 rotatable, and then use the adjusting screw 5 to adjust the dimension between the spherical centers of the abrasive members 8, 8 to the cylindrical member. Adjust it to be smaller than the inner diameter of W.

Further, the positions of the legs 1, 1 with respect to the rotating shaft 2 are adjusted by appropriate means so that the polishing members 8, 8 rotate around the axis of the rotating shaft 2, and the legs 1, 1 are fixed with nuts 4.

When the drilling machine is started and the polishing tool is moved forward and backward, the polishing member 8.8 reciprocates inside the hole in a trajectory as shown by the chain line and returns to its original position, during which time the polishing process is performed.

That is, at the entrance of the hole, the outer tips 8 of the abrasive members 8,8
a is pressed and the edge w1 is chamfered or chamfered.

Next, the elastic members 7, 7 of the polishing members 8, 8 are bent and enter the holes without force, and the outer portions 8b are pressed against each other, and the inner peripheral portions w2 are polished.

Further, at the exit of the hole, the outer root portions 8c of the polishing members 8, 8 are pressed against each other, and the edge portion w3 is chamfered or chamfered.

Next, the machining on the shaft side is the same as when machining the hole, except that the dimension between the spherical centers of the abrasive members 8, 8 is adjusted to be thicker than the outer diameter of the cylindrical member W, and as shown in FIG. The edge w4 of the abrasive members 8, 8 is processed by the inner tip portion 8d, the outer peripheral portion w5 is processed by the inner portion 8e, and the lower edge w6 is processed by the inner root portion 8f.

Each time the diameter of the cylindrical member W differs, processing is performed by adjusting the dimension between the spherical centers of the polishing members 8, 8 as described above.

In these processes, the abrasive members 8, 8 remain spherical even if the dimension between the spherical centers is changed, and since they contact the cylindrical member W at the same arc, the state of contact with the workpiece W may vary. By being able to process at the same angle, it is possible to process with the same quality.

Note that the polishing members 8, 8 are replaced with the elastic members 7, 8 as in this embodiment.
If the workpiece W is attached removably with the center at the tip of 7, when the machine screw 6 is loosened and the position is changed, the workpiece W will move in the same arc.
Since it comes into contact with the surface, the entire surface can be utilized without degrading the quality of processing, and it can be easily replaced.

As described in detail above, the present invention has a pair of spherical abrasive members whose center-to-center dimension is adjustable, attached to the tips of a pair of rod-shaped elastic members, and which polishes various cylinders with different diameters on the inner and outer peripheries. Can be polished using the same tool.

Further, even if the distance between the ball centers is changed, the polishing member contacts the workpiece with the same circular arc, so that polishing with stable quality can be performed.

In addition, it is possible to machine the edges of both the inner and outer circumferences of the cylinder without changing the setup, so the inner and outer circumferences of the cylinder and their edges can be arbitrarily selected over a wide range and machined using the same tool. It has many effects.

Note that the present invention is not limited to the above embodiments,
For example, the elastic member may have a prismatic shape, and it goes without saying that it can be modified in various ways without departing from the spirit of the invention.

[Brief explanation of drawings]

Fig. 1 is a front view of the abrasive tool of the present invention, Fig. 2 is a side view seen from direction A in Fig. 1, Fig. 3 is a front view of a modified example of the abrasive member, and Figs. 4 and 5 are It is a processing explanatory diagram. 1...Leg part, 1a...Spread leg end part, 2.
... Rotating shaft, 5 ... Adjustment screw, 7 ...
... rod-shaped elastic member, 8 ... spherical abrasive member,
W: Cylindrical member of the workpiece.

Claims (1)

[Scope of utility model registration request] a leg-spread adjustment section having a pair of legs connected to a rotating shaft and whose openings are adjustable; and a pair of rod-shaped elastic members removably attached to the end portions of the legs. A polishing tool comprising: a spherical polishing member attached to the tip of each of the elastic members and rotating around the axis of the rotating shaft.