JPS5949135B2 - Cutter for cutting steel fibers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutter used for producing steel fiber reinforcing material mixed into concrete, asphalt, etc. for the purpose of reinforcing the strength thereof.

When steel fiber reinforcement is mixed into concrete, etc., it is generally recommended that the mixing rate be 1 to 2% by volume, but if this volume ratio is converted, it is 80 to 160, or 9/7FZ'. Therefore, a large amount of steel fiber reinforcing material is required to be mixed per unit volume of cement, and therefore, it is desired to reduce the unit price of the steel fiber reinforcing material.

From this point of view, as a method for efficiently and inexpensively manufacturing a large amount of steel fiber reinforcement, a technique of cutting steel fiber reinforcement directly from a steel billet with a cutter has attracted attention, and various proposals and implementations have been made. Generally, a roll-shaped cutter is used, which is made by laminating a plurality of disc-shaped cutters with a plurality of cutting blade tips with a blade width corresponding to the length of the steel fiber reinforcement so that the width corresponds to the width of the steel slab. ing.

Specifically, a plurality of cutters disclosed in Japanese Utility Model Application Publication No. 55-37102 are stacked and used, and the cutting edge of the cutter is made of steel fibers of a predetermined length and a suitable length. The positions of the cutting blades between adjacent disc-shaped cutters are shifted so as to have a twist, and the cutting blades are also set at an appropriate helix angle so that they partially overlap at both ends to avoid leaving uncut parts on the steel piece. has been granted. However,
If the disc-shaped cutters as described above are simply stacked, both ends of the cutting edge 1 will come into point contact with the side surfaces of the adjacent disc-shaped cutter 2, as partially shown in FIG. The component force Fs of the resistance F acts in the direction of the arrow in the figure, causing damage to the end of the cutting blade tip 1 that is in point contact with the side surface of the cutter. If an edge having a section is used as a cutting edge, it is not possible to obtain steel fibers with a predetermined shape.

Furthermore, a gap δ is created between each disc-shaped cutter 2, and when the formed steel fibers enter there and accumulate, they have an adverse effect on newly formed steel fibers, making it difficult to obtain steel fibers with a predetermined shape. It disappears.

In view of the above-mentioned problems, the present invention has been made with the object of eliminating the gap between adjacent disc-shaped cutters and making the cutting edge come in line contact with the side surface of the cutter, thereby providing a cutter with excellent performance. The main feature is that the outer circumferential surface of the disc-shaped cutter body has an appropriate helix angle and radial rake, and a flat tip is attached to the side of the cutter body so that at least one end protrudes slightly. In addition to removably planting a plurality of chips, a notch is provided on the outer periphery of one side of the cutter body to accommodate the lateral protrusion of one of the tips, and a cutout is provided on the outer periphery of the other side of the cutter body to accommodate the lateral protrusion of one of the tips. The point is that an appropriate number of disc-shaped cutters each having an inclined notch corresponding to the angle of inclination formed by the ridge line of the protruding part that accommodates the side protruding part are laminated in close contact with each other.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

To facilitate understanding, a single disc-shaped cutter will be explained first. As shown in FIG. A wedge piece 9 and a screw 10 for fixing it to the cutter body 5 are arranged so that the flat tip 8 has an appropriate helix angle α and negative radial rake β, and so that both ends of the tip 8 protrude slightly from the width W of the small ivy. It is tightened by

Further, one side of the cutter body 5 is provided with a notch 11 for accommodating one side protrusion of the tips 8 when they are stacked, as shown in FIG. 3, which is a partial view of the cutter of the present invention. At the same time, the other side has the ridge line 1 of the other side protrusion.
2 is provided with an inclined notch 13 having an inclination angle corresponding to the tip 8.
is configured to be in line contact with the inclined notch 13. It goes without saying that the helix angle α and the radial rake β are appropriately selected and used depending on the material of the workpiece.

In the cutter of the present invention having the arm structure described above, cutouts corresponding to the protruding parts of the tips 8 are provided on both sides of each disc-shaped cutter main body 5, so that when they are stacked, each disc Since there is no gap between the shaped cutters, there is no negative effect associated with the accumulation of steel fibers as in the conventional case, and the ridgeline 12 at the end of the chip 8 that receives the component force Fs of the cutting resistance has a slope of the inclined notch 13. Since it is in line contact with the surface, even if a large component force is received, it is received by the ridge line 12 of the chip 8, so there is no damage to the end of the chip 8, and therefore, the chip 8 has excellent performance. By being able to provide a cutter and, in turn, extending the life of the cutter, it becomes possible to provide an inexpensive steel fiber reinforcing material, which has an extremely large effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is an explanatory diagram of a disc-shaped cutter constituting the cutter of the present invention, and FIG. 3 is a partial explanatory diagram of the cutter of the present invention.

1: cutting edge tip, 2° disc-shaped cutter, 5: cutter body, 6: groove, 7 reseat, 8: flat tip, 9: wedge piece, 10: screw, 11: notch, 13: inclined notch.

Claims (1)

[Claims] 1 Set an appropriate helix angle on the outer circumferential surface of the disc-shaped cutter body.
In addition to having a radial rake, a plurality of flat tips are removably implanted on the side of the cutter body so that at least one end slightly protrudes, and one of the tips is attached to the outer periphery of one side of the cutter body. A notch is provided to accommodate the lateral protrusion, and an inclined notch corresponding to the inclination angle formed by the ridge line of the protrusion is provided on the outer periphery of the other side of the cutter body to accommodate the other lateral protrusion of the tip. A steel fiber cutting cutter made by closely stacking an appropriate number of disc-shaped cutters.