JPH0471664B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a chamfering device for removing burrs formed on the edges of a workpiece.

[Technical background of the invention and its problems]

For example, when various workpieces such as metal parts, plastic parts, and ceramic parts are formed, it is inevitable that burrs will be generated on the edges thereof. Therefore, after forming such a workpiece into a predetermined shape, it must be chamfered to remove burrs.

Conventionally, so-called barrel machining is known as a method for chamfering such a workpiece, in which the workpiece and abrasive grains are put into a container and the container is rotated. However, in this type of barrel machining, the abrasive grains move freely within the container along with the workpiece, so the workpiece is polished by the abrasive grains in areas other than the edges where burrs are generated. As a result, the dimensions of this workpiece became smaller. Furthermore, since the workpieces collide with each other within the container, the surfaces of the workpieces may be scratched. Furthermore, barrel machining sometimes takes a considerable amount of time to remove burrs from the workpiece.

[Purpose of the invention]

This invention prevents parts of the workpieces other than the edges from being polished and their dimensions becoming smaller, or from colliding with each other and causing scratches on the surface.
Moreover, it is an object of the present invention to provide a chamfering device that can efficiently and reliably remove burrs.

[Summary of the invention]

The present invention includes a holding plate formed with a holding hole for rotatably holding a workpiece and held substantially horizontally;
A polishing body is arranged opposite to the lower surface of the holding plate and rotates while being in contact with the workpiece held in the holding hole; This chamfering device includes a regulating plate provided on the lower surface of the elastic body that elastically presses the workpiece when the edge portion is rubbed by the polishing body.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. The chamfering device shown in FIG. 1 has a disc-shaped polishing body 1. The chamfering device shown in FIG. The upper surface of this polishing body 1 is formed into a polishing surface 3 by, for example, attaching abrasive grains, and a drive shaft 5 that is rotationally driven by a drive source (not shown) is fixed to the center of the lower surface. A holding plate 7 is arranged on the upper surface side of the polishing body 1 so as to be spaced apart from each other and facing each other. A plurality of mounting pieces 9 are attached from the outer periphery of this holding plate 7.
are extended, and these attachment pieces 9 are attached and fixed to the fixed part 11 with screws 13. Also,
A large number of holding holes 15 are bored in the holding plate 7 at equal radii from the center of rotation. For example, polyhedral workpieces 17 having a hexagonal cross section are inserted into these holding holes 15, respectively. That is, the workpieces 17 are held in the holding holes 15 in a state where they are in contact with the polishing surface 3 of the polishing body 1 and can freely rotate. A regulating plate 19 is arranged on the upper surface side of the holding plate 7. An elastic body 20 made of a material such as rubber is attached to the lower surface of the regulation plate 19, and a drive shaft 21 that is rotationally driven by a drive source (not shown) is connected to the center of the upper surface. . The elastic body 20
The distance between the workpiece 17 and the polishing body 1 is determined by elastically pressing the workpiece 17 when the workpiece 17 brings its edge portion 17a into contact with the polishing body 1.
7... is set in a state in which it is not pressed when the flat surfaces 17b... are in contact with each other. In other words, the distance between the polishing body 1 and the elastic body 20 is
7... is set slightly smaller than the diagonal dimension d. Further, a projection 2 is provided on the upper surface of the regulation plate 19.
5 protrudes in an annular shape, and a plurality of through holes 23 are bored at predetermined intervals in the circumferential direction in a portion radially inward from this. The polishing liquid L is supplied to the supply pipe 2 at a location inside the protrusion 25 on the upper surface side of this regulation plate 19.
7. This polishing liquid L is guided to the upper surface of the polishing body 1 through the through holes 23 . At this time, if the regulating plate 19 is rotationally driven, the polishing liquid L will be supplied to the upper surface of the polishing body 1 in a substantially uniformly distributed manner. A pump 29 is connected to the supply pipe 27, and a suction side of the pump 29 is connected to a tank 3 containing polishing liquid L.
It is connected to 1. Although details are not shown,
The polishing liquid L supplied to the polishing body 1 from the supply pipe 27 is collected into the tank 31. Further, the regulating plate 19 can be moved upward together with the drive shaft 21, that is, in a direction away from the holding plate 7.

In the chamfering device configured in this way,
When the regulating plate 19 is separated from the holding plate 7 and the workpiece 17 is held in the holding hole 15 of the holding plate 7, the regulating plate 19 is moved between the elastic body 20 provided on the lower surface and the polishing body 1. The workpieces 17 are positioned so that the distance therebetween is slightly smaller than the diagonal dimension d of the workpieces 17. In this state, the polishing liquid L is supplied and the polishing body 1 is rotationally driven. Then, the workpieces 17 rotatably held in the holding holes 15 rotate while being polished by the polishing surface 3 due to contact friction with the polishing surface 3. And the workpiece 17...
When the edge portion 17a... of comes into contact with the polishing surface 3,
The workpieces 17 are pressed against the polishing surface 3 by an elastic body 20 provided on the regulating plate 19, as shown in FIG. Therefore, the workpiece 17...
Since the frictional force between the edge portions 17a and the polishing surface 3 is temporarily increased, the burr on the edge portions 17a is reliably and quickly removed by polishing. Moreover, as shown in FIG. 4, the workpieces 17... have flat surfaces 17b... other than the edge portions 17a...
also comes into contact with the polishing surface 3, but at that time the elastic body 21
Since it is not pressed by the edge portions 17a, the contact resistance with the polishing surface 3 is smaller than that of the edge portions 17a, so that they are hardly polished. In addition, the workpiece 17...
are held in the holding holes 15, respectively, so that they do not collide with each other and cause scratches on the surface. Moreover, if the regulation plate 19 is rotated,
Not only is the polishing liquid L uniformly dispersed, but the elastic body 20 on the lower surface is forcibly rotated when it comes into contact with the workpiece 17, which also prevents burrs on the edge portions 17a. is effectively removed.

In the above embodiment, abrasive grains were attached to the polishing body to form the polishing surface, but while the polishing body was made of cast iron or non-ferrous metal, it was also possible to mix fine powder such as alumina or silicon into the polishing liquid. The workpiece may be polished using this polishing liquid and the polishing body.
In addition, the drive shaft is mounted eccentrically with respect to the regulation plate,
By eccentrically rotating this regulating plate, the workpiece can be rotated in all directions by the elastic body attached to the regulating plate, thereby improving the efficiency of deburring the workpiece. Furthermore, by shifting the rotation centers of the polishing body and the regulating plate, the workpiece can be rotated in all directions and deburring can be performed satisfactorily.

〔Effect of the invention〕

As described above, the present invention rotatably holds a workpiece in a holding hole of a holding plate, and a polishing body is disposed on the lower surface side of the holding plate in contact with the workpiece, and the polishing body is disposed on the lower surface side of the holding plate, and A regulating plate is disposed on the lower surface of the regulating plate, and an elastic body is provided on the lower surface of the regulating plate to elastically press the workpiece when the edge portion of the workpiece is polished by the upper surface of the polishing body. Therefore, unlike conventional barrel machining, the workpieces do not collide with each other and cause scratches on the surface. In addition, when the edges of the workpiece come into contact with the polishing body, they are pressed by the elastic body and are strongly polished, but when other parts are in contact with the polishing body, they are not pressed by the elastic body. It will not be strongly polished. Therefore, the portions other than the edge portions of the workpiece will not be polished more than necessary and the shape of the workpiece will not become smaller. Furthermore, since the polishing body and the regulating plate are driven to rotate and the polishing liquid is supplied to the polishing area through the through hole, there is an advantage that chamfering can be carried out efficiently and reliably.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic configuration diagram of the entire device, Fig. 2 is a plan view of the holding plate, and Fig. 3 shows a state in which the workpiece is pressed by an elastic body. FIG. 4 is an enlarged view of the unpressed state. DESCRIPTION OF SYMBOLS 1... Polishing body, 5... Drive shaft (first rotational drive means), 7... Holding plate, 15... Holding hole, 17...
...Workpiece, 19...Regulation plate, 20...Elastic body,
21... Drive shaft (second rotational drive means), 23...
...Through hole, 27... Supply pipe (polishing liquid supply means), L
...polishing liquid.

Claims (1)

[Scope of Claims] 1. A holding plate having a holding hole for rotatably holding a workpiece having an edge portion and held substantially horizontally; A polishing body for polishing the edge portion of the held workpiece, a first rotational drive means for rotationally driving the polishing body, a regulating plate disposed opposite to the upper surface of the holding plate, and the regulating plate. A second drive that rotates the plate.
an elastic body provided on the lower surface of the regulating plate facing the upper surface of the polishing body and elastically pressing the workpiece held by the holding plate against the polishing body; a plurality of through holes provided through the body and the regulating plate in the thickness direction, and a polishing liquid supply means for supplying polishing liquid to the upper surface side of the polishing body through these through holes, A chamfering device characterized in that a distance between the elastic body and the polishing body is set to be slightly smaller than a maximum external dimension of the workpiece. 2. The chamfering device according to claim 1, wherein the rotation centers of the regulating plate and the polishing body are shifted from each other.