KR200474400Y1 - Rotary cutter for rounding and chamferign - Google Patents

Abstract

The rotary cutter for surface rotation coupled to the rotary shaft may include a plurality of cutting edge portions formed on the outer peripheral surface, and at least one of the cutting edge portions may have an inclination angle with respect to the rotary axis.

Description

{ROTARY CUTTER FOR ROUNDING AND CHAMFERIGN}

The present invention relates to a rotary cutter for abrading which can improve the cutting force.

Generally, after cutting an iron plate, a sharp edge portion of the cut steel plate is chamfered by using a grinder equipped with a polishing disk, and chamfering work using a polishing disk takes a lot of time and effort, There is a problem. Therefore, instead of grinding a sharp edge portion of the steel plate with a polishing disk, a method of cutting with a rotary cutter and chamfering is used.

A public utility model publication No. 20-2010-0010622 entitled " Rotary cutter fixing bolt for chamfering machine equipped with guide bearing " will be described with reference to a conventional rotary cutter.

Fig. 1 corresponds to Fig. 1 of the public utility model. Referring to FIG. 1, a rotary cutter 23, which is mainly used for chamfering an iron plate, is formed in the shape of an inverted truncated cone, a shaft insertion hole having a keyway formed on one side of the inner circumferential surface thereof, Respectively. The rotary cutter 23 is provided with a key groove formed on one side of the inner circumferential surface of the shaft insertion hole and a key groove formed on one side of the outer circumferential surface of the rotary shaft 21, The cutter fixing key 22 is inserted in accordance with the formed keyway. The rotary cutter fixing bolt 25 provided with the guide bearing 24 may be fastened to the bolt fastening hole 21a formed at the center of the rotary shaft 21. [ The rotating rotary cutter 23 can be easily mounted on the electric tool or the air tool 20 and can be quickly cut by sharp edges of the iron plate 30 while being rotated at a high speed by the rotary shaft 21 have.

When a piece of the iron plate cut out at the cutting edge portion of the rotary cutter 23 formed in the shape of a reverse truncated cone is cut upward, the portion of the rotary cutter 23 abutting against the iron plate is subjected to a relatively downward force do.

On the other hand, since the cutting edge portions of the rotary rotary cutter 23 are all inclined in the same direction with respect to the rotary shaft 21, the rotary cutter 23 facing the iron plate continuously receives the downward force Assuming, the other side is constantly being forced upward.

That is to say, during the cutting operation of the iron plate, the rotary rotary cutter 23 for finishing the surface can finely tilt left and right up and down with respect to the rotary shaft 21, and when the rotary cutter 23 is severely trembled, The cutter is detached from the pressing portion 27, which may cause a serious problem that threatens the safety of the operator.

In addition, if the rotating rotary cutter 23 is moved severely while being rotated, the workability of the plate blanking operation is significantly reduced, and the durability of the rotating rotary cutter 23 may be deteriorated.

As mentioned in the background art, the rotary cutter for surface cutting, which has a cutting edge portion inclined at the same inclination as both the power tool and the rotary shaft of the air tool, receives a continuous force in the same direction in the cutting face cutting rotary cutter portion , The left and right sides of the rotary cutter for flipping vertically. The present invention provides a rotary cutter for cotton that can prevent shaking during chamfering.

According to an exemplary embodiment of the present invention, the rotary cutter for surface rotation coupled to the rotary shaft may include a plurality of cutting edge portions formed on the outer peripheral surface, and at least one of the cutting edge portions may have a different inclination angle with respect to the rotary axis have.

An axial insertion hole through which the rotary cutter fixing bolt passes is formed at the center of the rotary rotary cutter for attachment and can be coupled to the rotary shaft by a rotary cutter fixing bolt coming in from below. The outer circumferential surface of the rotary cutter fixing bolt and the inner circumferential surface of the shaft insertion hole of the abutment rotary cutter are engaged with each other in a state of being in close contact with each other so that the abutment rotary cutter can be stably coupled to the rotary shaft of the power tool or the air tool and rotated together with the rotary shaft.

Approximately 2 to 24 cutting edge portions may be formed on the outer circumferential surface of the rotary cutter for abutment, and effective chamfering is possible by the sharp cutting edge portion.

The rotating rotary cutter may include at least one cutting edge portion having a different inclination angle from the other cutting edge portions.

The inclination angle of the cutting edge portion may influence the direction of the force or the magnitude of the force received by the cutting edge during the chamfering process. In the present rotary cutting device, the cutting edge portions having different inclination angles are appropriately combined, The direction of the force received or the magnitude of the force.

For example, if the direction of the tilt angle is constant and the cutting edge portions having different tilt angles are arranged alternately, the direction of the force received by the tapered rotary cutter is constant, but depending on the size of the tilt angle of the cutting edge, The magnitude of the force received may vary.

In addition, when the cutting edge portions whose directions of the tilt angles are opposite to each other are arranged alternately, the direction of the force received by the rotary truing cutter can be continuously switched to prevent the rotary truing cutter from shaking severely.

Specifically, assuming that a piece of the iron plate cut out by the cutting edge portion abutting the iron plate protrudes upward, the rotary cutter portion abutting against the iron plate receives relatively downward force.

However, when the cutting edge portions having mutually opposite directions of the inclination angles are arranged alternately, since the rotary cutter for abutment against the iron plate receives alternately upward and downward forces, the force of the abutment rotary cutter The tremor is reduced.

Therefore, workability is improved in the case of iron plate chamfering, and the durability of the rotating rotary cutter for a cotton is improved and the replacing time can be delayed.

Further, if the severe tilting of the rotary rotary cutter is continued, the rotary cutter fixing bolt which is directly coupled to the rotary shaft can be separated, which may cause a serious problem that threatens the safety of the operator. However, the rotating rotary cutter of the present invention can solve the above problem by minimizing tremble during use.

Further, it is possible to provide the first cutting edge and the second cutting edge which are different in radius of curvature from the outer surface of the cutting edge portion of the rotary rotary cutter for surface finishing, so that the steel plate can be chamfered more smoothly.

Further, the radius of curvature of the first cutting edge can be provided larger than that of the second cutting edge, and a second cutting edge can be formed inside the first cutting edge.

In addition, the cutting edge portion may include a C-shaped cutting surface, and the first cutting edge and the second cutting edge may be formed on the C-shaped cutting surface. In some cases, the cutting edge portion may include a C- And the first cutting edge and the second cutting edge may be formed via the C-shaped cutting surface and the straight cutting surface.

Further, each of the first cutting edge and the second cutting edge may be provided with any one of a convex surface, a concave surface, and a flat surface, and in particular, a first cutting edge having a concave surface and a second cutting edge having a second cutting edge The cutter is useful for smoothing the cutting surface of an iron plate which is open to the periphery and which can be easily accessed by a cotton rotary cutter, and the cotton cutter having a first cutting edge and a second cutting edge provided with a convex surface, It can be used to shave weld beads between two vertically welded steel plates.

The rotary cutter having a cutting edge portion inclined at the same inclination with respect to the rotary shaft receives a continuous force in the same direction as the rotary cutter portion for cutting the iron plate so that the left and right sides of the rotary cutter for vertical rotation are vibrated up and down. However, the rotating rotary cutter of the present invention can appropriately combine the cutting edge portions having different inclination angles to adjust the direction and force of the force received by the rotary rotary cutter during the cutting process. Therefore, Can be prevented.

Particularly, in the present invention, the rotary cutter of the present invention is arranged such that the cutting edge portions whose directions of the inclination angles are opposite to each other are alternately arranged so that the rotary cutter portion for face contact with the iron plate receives alternately upward and downward forces, The vibration of the spinning rotary cutter is reduced more than when the force is applied. Therefore, workability is improved when machining the iron plate, and the durability of the rotating rotary cutter for cotton is improved, and the replacement time can be delayed.

The cutting edge portion of the rotating rotary cutter of the present invention has two cutting edges having different radii of curvature, so that the steel plate can be chamfered more smoothly. Specifically, in the present invention, by providing a first cutting edge having a large radius of curvature around a second cutting edge having a small radius of curvature, cutting lines that can be generated by the second cutting edge having a small radius are removed through the first cutting edge can do. Therefore, smoother chamfering is possible.

The rotary cutter of the present invention can be used to smooth the cutting surface of the steel plate by making the cutting edge concave, and in some cases, by using a cutting edge provided convexly, It can be useful for carving out weld beads between two steel plates.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a drawing of a public utility model having the publication number 20-2010-0010622.
2 is a perspective view of a rotary cutter for spinning according to one embodiment of the present invention.
3 is a plan view of a rotary cutter for spinning according to an embodiment of the present invention.
Fig. 4 is a schematic view of a rotary cutter for spinning according to an embodiment of the present invention, which is shown for facilitating identification of an inclined surface of a cutting edge.
Fig. 5 is a view of a rotary cutter for spinning according to another embodiment of the present invention. Fig.
Fig. 6 is a partial sectional view of a rotary cutter for dicing to describe various cutting edge portions according to still another embodiment of the present invention; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to these embodiments. For reference, the same numbers in this description refer to substantially the same elements and can be described with reference to the contents described in the other drawings under these rules, and the contents which are judged to be obvious to the person skilled in the art or repeated can be omitted.

FIG. 3 is a plan view of a rotary cutter for a face according to an embodiment of the present invention, and FIG. 4 is a schematic view of a rotary cutter for a face according to an embodiment of the present invention shown for facilitating identification of an inclined face of a cutting edge.

3 and 4, a shaft insertion hole 104 through which the rotary cutter fixing bolt passes is formed at the center of the rotary cutter 100 for facing, and the rotary cutter fixing bolt, . The outer circumferential surface of the rotary cutter fixing bolt and the inner circumferential surface of the shaft insertion hole 104 of the abutment rotary cutter 100 come into tight contact with each other so that the abutment rotary cutter 100 is stably coupled to the rotary shaft of the power tool or air tool And can rotate together with the rotating shaft.

Approximately 2 to 24 cutting edge portions may be formed on the outer circumferential surface of the rotary cutter for surface irrigation. In this embodiment, eight cutting edge portions 120 enable effective chamfering.

In addition, the inclination angle of the cutting edge part may influence the direction of the force or the magnitude of the force received by the cutting edge during the chamfering process. In the inventive rotary cutter, the cutting edge parts having different inclination angles are appropriately combined, The direction of the force or the magnitude of the force received by the rotary cutter can be adjusted. For example, if the direction of the tilt angle is constant and the cutting edge portions having different tilt angles are arranged alternately, the direction of the force received by the tapered rotary cutter is constant, but depending on the size of the tilt angle of the cutting edge, The magnitude of the force can vary.

4, the cutting rotary cutter 100 of the present embodiment has a plurality of cutting edge portions 120. Each of the cutting edge portions 120 includes a first cutting edge 122a facing the rotation direction of the cutting edge portion 120, Or a second cutting edge 122b. At this time, the first cutting edge 122a has the first cutting angle? 1, the second cutting edge 122b has the second cutting angle? 2, and the first cutting angle? 1 and the second cutting angle? Is formed such that the first cutting edge 122a and the second cutting edge 122b are inclined in opposite directions with respect to the vertical section along the rotation axis. 4, the cutting edge portions 120a and 120b having the first cutting edge 122a and the second edge face 122b and having mutually different inclination angles are alternately arranged along the rotational direction of the cutting edge portion . Therefore, the first cutting section and the second cutting section alternately cut the workpiece (for example, the steel plate), and the direction of the force applied to the rotating rotary cutter 100 is continuously switched, 100 can be prevented from being shaken severely. In FIG. 3, the cutting edge portions 120a and 120b having different inclination angles can be identified. When the rotary cutter 100 is viewed from below, the first cutting edge 120a of the one cutting edge 120a The second cutting edge 122b of the other cutting edge portion 120b adjacent to the one cutting edge portion 120a is tilted inward with respect to the vertical cross-section, It can not be seen from above.

Specifically, assuming that a piece of the iron plate cut off by the cutting edge portion 120 abutting the iron plate protrudes upward, the portion of the rotary cutter 100 abutting against the iron plate receives relatively downward force.

However, as shown in FIG. 4, when the cutting edge portions 120 having mutually opposite inclination angle directions are arranged alternately, the force applied by the rotary cutter 100 abutting against the iron plate is switched to the vertical direction, The vibration of the spinning rotary cutter 100 is reduced as compared with the case of receiving the continuous force.

Accordingly, workability is improved in the case of iron plate chamfering, and the durability of the rotary rotary cutter 100 for a cotton is improved, and the replacement period can be delayed.

Further, if the severe tilting of the rotary rotary cutter is continued, the rotary cutter fixing bolt which is directly coupled to the rotary shaft can be separated, which may cause a serious problem that threatens the safety of the operator. However, the rotating rotary cutter 100 of the present invention can solve the above problem by minimizing shaking during use.

Fig. 5 is a view of a rotary cutter for spinning according to another embodiment of the present invention. Fig. The spinning rotary cutter of this embodiment is substantially similar to the spinning rotary cutter of the preceding embodiment. Therefore, the description of the rotary cutter for surface treatment according to the present embodiment can be referred to the previous embodiment, and in this embodiment, the cutting edge portion which is different from the previous embodiment will be mainly described.

5, a first cutting edge 250 and a second cutting edge 260 having different radii of curvature are formed on the outer surface of the cutting edge 220 of the rotary cutter 200 for facing, Can be processed.

Meanwhile, in this embodiment, the cutting edge portions 220 having different inclination angles are alternately arranged. However, the cutting edge of the cutting edge 220 shown in FIG. 5 is inclined inward so that it can not be visually recognized as viewed from the bottom, as in the case of the first edge 122a of the edge 120a shown in FIG. 3 Do not.

The radius of curvature of the first cutting edge 250 may be greater than that of the second cutting edge 260 and the second cutting edge 260 may be formed inside the first cutting edge 250. Provides double cutting edge for smooth chamfering. Specifically, by providing the first cutting edge 250 having a large radius of curvature around the second cutting edge 260 having a small radius of curvature, a cutting line that can be generated by the second edge 260 having a small radius is formed 1 < / RTI > Therefore, smoother chamfering is possible.

Further, the cutting edge portion may include a C-shaped cutting surface, and the first cutting edge and the second cutting edge may be formed on the C-shaped cutting surface. In this embodiment, the cutting edge portion 220 includes a C- 240 and a straight cutting surface 230 that is in contact with the C-shaped cutting surface 240. The first cutting edge 250 and the second cutting edge 260 include a C-shaped cutting surface 240 and a straight- (230). The straight cutting surface 230 precedes the iron plate, and further chamfering is performed by the C-shaped cutting surface 240 immediately following it, so that smoother chamfering is possible.

Meanwhile, in this embodiment, the first cutting edge 250 and the second cutting edge 260 are provided as concave surfaces. The rotary cutting cutter 200 having a first cutting edge 250 and a second cutting edge 260 having a concave surface is cut in a manner such that the periphery is opened and the cutting rotary cutter 200 is easily accessible It is useful for smoothing the surface.

Fig. 6 is a partial sectional view of a rotary cutter for dicing to describe various cutting edge portions according to still another embodiment of the present invention; Fig. In the present embodiment, the cutting edge portion which is different from the previous embodiment will be mainly described.

Both the first cutting edge 350 and the second cutting edge 360 of FIG. 6 (a) are provided with convex surfaces. Therefore, it is easy to access the corner portion where the two iron plates contact with each other, which is relatively difficult to access the rotary cutting tool 300 for cotton. For example, a turning rotary cutter having a first cutting edge 350 and a second cutting edge 360 provided with a convex surface is very useful when cutting a weld bead between two steel plates welded perpendicularly to each other .

6 (b), the first cutting edge 450 and the second cutting edge 460 may be provided as planar and concave, respectively, and as shown in Fig. 6 (c) The blade 550 and the second cutting edge 560 may be provided in plan and convex planes, respectively.

For reference, a straight cutting edge is useful for chamfering operations that slash sharp edges or corners of a steel plate.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It can be understood that

100: Rotary cutter for cotton threading 104: Axial insertion hole
120: a cutting edge part 130: a straight cutting face
140: C-shaped cutting surface 150: First cutting edge
160: 2nd cutting edge

Claims (8)

1. A rotary cutter for a face to be engaged with a rotary shaft,
And a plurality of cutting edge portions formed on the outer peripheral surface,
Wherein each of the cutting edge portions is provided with a first cutting edge or a second cutting edge for viewing the rotating direction of the cutting edge,
Wherein the first cutting angle? 1 of the first cutting section and the second cutting angle? 2 of the second cutting section are set such that the first cutting section and the second cutting section are opposed to each other with respect to a vertical section along the rotation axis Direction,
Wherein the first cutting edge and the second cutting edge are alternately arranged along the rotation direction of the cutting edge so that the first cutting edge and the second cutting edge alternately cut the workpiece. Rotary cutter. delete delete The method according to claim 1,
Wherein a first cutting edge and a second cutting edge having different radii of curvature are formed on the outer surface of the cutting edge part. 5. The method of claim 4,
Wherein a radius of curvature of the first cutting edge is larger than that of the second cutting edge,
And the second cutting edge is formed inside the first cutting edge. 5. The method of claim 4,
Wherein the cutting edge portion includes a C-shaped cutting surface,
Wherein the first cutting edge and the second cutting edge are formed on the C-shaped cutting surface. 5. The method of claim 4,
Wherein the cutting edge portion includes a C-shaped cutting surface and a straight cutting surface that is in contact with the C-shaped cutting surface,
Wherein the first cutting edge and the second cutting edge are formed via the C-shaped cutting surface and the straight cutting surface. 5. The method of claim 4,
Wherein each of the first cutting edge and the second cutting edge is provided with one of a convex surface, a concave surface, and a flat surface.

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