JPS5915769B2 - Chamfering device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chamfering device that continuously chamfers the edge of a steel plate, for example.

To give an example, the steel strips used for press working are left with a sliver attached to them.

As is well known, this paris is an obstacle during press processing or handling, and must be removed before processing.

However, what is more preferable is not only to simply remove the paris, but also to simultaneously chamfer them to a width of about 0.01 to 0.5 m++.

Conventionally, such chamfering was performed continuously using a cutting tool, a grinder, or the like.

However, the tool life of a cutting tool is short, and if the edge of the steel strip plate is wavy, the tool bites into the edge, making the chamfer width inconsistent.

In addition, grinders tend to produce secondary particles, and are also problematic due to noise or falling abrasive grains.

This invention has been made in view of the above circumstances, and provides a device that can precisely chamfer a fixed width by bringing a stationary rotating circular cutter into suitable rotational contact with the ridge of a plate being fed at a predetermined speed. This is what we provide.

Hereinafter, the present invention will be explained based on drawings showing embodiments.

FIG. 1 shows an example of a disc cutter 1 used to carry out the present invention, which has a disc-shaped main body 3 with a shaft attachment part 2 at the center of the back side, and one surface of the main body 3, namely An annular cutting edge 5 is fixed to the periphery of the main surface 40 facing the workpiece by brazing, screwing, adhesive, or the like.

The cutting edge portion 5 made of cemented carbide protrudes from the main surface 4,
As shown in FIG. 2, a flank face 6 having a predetermined angle γ and a clearance face 7 having a free angle α are formed.

FIG. 3 schematically shows a chamfering device using the above-described disk cutter 1, in which 10 is a workpiece, a steel strip plate with a thickness of 0.5 mm, which is fed at a predetermined speed by feed rollers 11atllb arranged above and below. It is now possible to

A drive motor 12 is disposed at one end of the steel strip 10 so as to be slidable by a reciprocating mechanism (not shown) and tilted with respect to the surface of the steel strip 100, and a disk cutter 1 is mounted on the rotation axis of the drive motor 12. installed.

As for the inclination of the drive motor 12, it is preferable that the angle β between the cutting edge portion 5 of the disc cutter 1 and the surface of the steel strip 100 be approximately 30°.

Further, although not shown, a drive motor 12 and a disc cutter 1 are arranged at the other end of the steel strip 10 symmetrically with the one end.

For example, the upper ridge portion 13 of the steel strip 10 can be
To explain chamfering, the drive motor 12, which is already in operation, is moved by the reciprocating mechanism (not shown), and the cutting edge 5 of the disc cutter 1 is applied to the ridge 13 of the steel strip 10 that is being fed at a predetermined speed. Chamfering is performed by bringing the two into contact with each other.

At this time, the ridge portion 13 crosses a part of the cutting edge portion 5, so that two portions of the cutting edge portion 502 corresponding to both ends of the string in the traversed state are in contact with the ridge portion 13.

The chamfer width is determined by the amount of movement by the reciprocating mechanism.

By the way, the speed of the disc cutter 1 is preferably about 1/4 of the feeding speed of the steel strip 10.

That is, if the steel strip 10 is being fed at a rate of 50 m/min, the disc cutter 1 is rotated at a circumferential speed of 12rrLA-nin.

In addition, the rotation direction of the steel strip 10 is as shown in FIG.
direction (arrow B) that resists the feed (arrow A).

By passing the strip steel plate 10 in contact with the disc cutter 1 which is tilted at an angle β and rotating at a predetermined position, a cutting edge with a predetermined gap face 7 and flank face 6 is formed. The portion 5 is always in line contact with the ridge 13 at two places, and the ridge 13 is in line contact with the ridge 13 at 0 points.
．． Even small chamfer widths such as 01 to 0.5 tone can be continuously cut at a constant width and chamfered efficiently.

As explained above, the present invention makes line contact with the ridge of the workpiece at two points while rotating the disk cutter, which has an annular cutting edge protruding from and fixed to the periphery of the main surface of the disk-shaped body. Since the blades are cut in contact with each other in this way, even if the edges are wavy, they are always kept straight and cut continuously.

Therefore, the digging phenomenon was eliminated, the occurrence of secondary cracks was also prevented, and the chamfering accuracy was significantly improved.

In addition, since the cutting edge (nose), where the rake face and flank face are formed, is rotated and comes into contact with the ridge, it is less likely to overheat compared to a cutting tool, and the life of the tool is greatly improved. It was possible to do this without making any noise like a grinder.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that, for example, by changing the position of the disc cutter in the same manner as chamfering the upper ridge, chamfering the lower ridge can also be easily performed. .

Further, the disk cutter may be provided with a cutting edge portion without a rake face and a flank face.

Therefore, various modifications can be made without departing from the gist.

[Brief explanation of the drawing]

Fig. 1 is a side view of a disc cutter according to an embodiment of the present invention, Fig. 2 is a partial sectional view of the disc cutter, Fig. 3 is a schematic diagram showing an embodiment of the invention, and Fig. 4 is a chamfering process. FIG. 1... Disc cutter, 5... Cutting blade part, 6
... Relief surface, 7 ... Rake surface, 10.
・・・・・・Strip steel plate.

Claims (1)

[Claims] 1. A feeding mechanism that feeds a strip-shaped plate at a predetermined speed, and an annular cutting edge with a flank formed thereon, each of which is connected to each ridge at both ends of the upper or lower side of the plate. 2, which corresponds to both end portions of the chord that always constitute a predetermined rake angle and relief angle and cross a part of the cutting edge.
a pair of disk cutters provided at positions that abut each other at points;
It is characterized by comprising a drive source that rotationally drives the pair of disc cutters in a direction that resists the feeding of the plate body, and a reciprocating mechanism that allows the pair of disc cutters to freely move toward and away from the ridge. Surface rubbing device.