KR101104545B1 - Cutter with cutting insert and its cutting insert - Google Patents

Abstract

The present invention relates to a cutting insert and a cutter equipped with the cutting insert.

According to an embodiment of the present invention, the cutting insert and the cutter to which the cutting insert is mounted include a fastening hole 20 and an upper surface 12 in which an axis O is formed perpendicular to the upper surface 12 and the lower surface 14. The first and second separator grooves 16 and 18 formed on both side surfaces of the lower surface 14 and the lower surface 14 and tangential to the first and second separator grooves 16 and 18. The second curved surface 24 and the first separator groove formed at positions perpendicular to the first and second separator grooves 16 and 18 and tangential to the first curved surface 22 and the lower surface 14 formed on the first curved surface 22 and the lower surface 14. On one side of the first side 32, the second separator groove 18, the first linear cut in the corner 42 and the first curvature cut in the corner 52 is formed at an acute angle with the upper surface 12 on one side of 16). A second side surface 34 formed at an acute angle with the upper surface 12 to form a second linear cut line 44 and a second curvature cut line 54, and a lower surface 14 on one side of the first separator groove 16. Acute angle A fourth acute angle with the lower surface 14 on one side of the third side 36 and the second separator groove 18 on which the third linear cutout 46 and the third curvature cutout 56 are formed at the corners of the luer. And a fourth side 38 on which linear pickles 48 and fourth curvature picks 58 are formed.

Cutting insert, Cutter, Pickled, Linear pickled, Curving pickled, Double sided

Description

Cutting insert and cutter with cutting insert {Cutting insert and Cutter installed the same}

The present invention relates to a cutting insert, and more particularly, to a cutting insert which is installed in a cutter for gear processing to form a gear on a workpiece.

In general, the cutting insert is pickled at the corner, the cutting insert is installed in the cutter, the workpiece is cut by the relative movement of the cutter and the workpiece.

As an example of the above-described cutting process, there is a gear machining, wherein a cutting insert is installed in a wheel-type cutter, and the above-mentioned cutter is rotated to form a gear by processing a groove in the workpiece.

On the other hand, the cutting inserts are pickled at four corners in the shape of a hexahedron, and when one of the picklings ends their life, the cutting insert is cut by turning the cutting insert or turning it. .

In addition, the pickling is formed at the corner where the plane and the side meet, wherein the angle between the plane and the side forms an acute angle, the angle formed by the bottom side and the above-described side forms an obtuse angle, and the corner of the acute angle is pickled. Will be

That is, looking at the cross section of the cutting insert, it may be formed in a parallelogram or trapezoidal shape. As a result, a maximum of two kinds of pickles may be formed in the cutting insert, thereby reducing the use efficiency of the cutting insert.

As a technique proposed to solve the problems described above, WO 2006/28837, A Tangential cutting insert and milling cutter (hereinafter referred to as "traditional cutting insert") is known. .

The conventional cutting insert described above has a cross-sectional shape consisting of a pair of parallelograms or a pair of trapezoidal shapes, each of which is pickled at both edges of a pair of parallelograms or a pair of trapezoids, so that a maximum of one cutting insert is provided. Four pickles are formed.

However, the cutting insert described above is pickled at both edges of a pair of parallelograms or a pair of trapezoidal shapes, and in actual processing, the cutting chip discharge is discharged from the top pickling to the bottom pickling and the extended bottom is raised. There is a problem that the chip discharge is not smooth by pickling.

In addition, as described above, in order to form a plurality of pickles on one side of the cube, a first side included in any one pickle and a second side included in another second pickle are formed. The side and the second side have different inclination angles, and in order to form two different types of first and second sides on one side, a cutting insert is manufactured through a sintering manufacturing process and thus manufactured. There is a problem that the unit price rises.

On the other hand, the cutting insert may be stressed in the direction that the cutting insert is to be peeled off the cutter while cutting is performed after the cutting insert is fastened and mounted to the cutter, and this stress may weaken the binding force of the cutting insert. Even the cutting insert may be separated from the cutter, and a safety accident may occur, and the workpiece being processed has a problem that the product value is lost.

Therefore, the technical problem to be achieved by the present invention is to form a separator groove on one side of the cutting insert and to form a pickling side on each side of the separator groove so as to form two kinds of pickles. It is an object of the present invention to provide a cutting insert that can be formed by cutting.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, another technical problem that is not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

Cutting insert according to an embodiment of the present invention for achieving the above technical problem, the fastening hole is formed in the axis (O) perpendicular to the upper surface and the lower surface; First and second separator grooves formed on both side surfaces of the upper surface and the lower surface, respectively; A first curved surface tangential to the upper surface and formed at a position orthogonal to the first and second separator grooves; A second curved surface tangential to the lower surface and formed at a position orthogonal to the first and second separator grooves; A first side surface having an acute angle with the upper surface on one side of the first separator groove to form a first linear pickle and a first curvature pickle; A second side surface having an acute angle with the upper surface on one side of the second separator groove to form a second linear pickle and a second curvature pickle; A third side surface having an acute angle with the bottom surface on one side of the first separator groove to form a third linear pickle and a third curvature pickle; And a fourth side surface having an acute angle with the lower surface on one side of the second separator groove to form a fourth linear cut and a fourth curvature cut.

In addition, all of the acute angle may be from 70 ° to 85 °.

In addition, the first linear cut-in, the second linear cut-in, the third linear cut-in and the fourth linear cut-in may be parallel to each other.

Cutter equipped with a cutting insert according to an embodiment of the present invention for achieving the above technical problem, the upper surface or the bottom surface is in contact with; A separator groove formed concave on the side of the base sheet; A first side sheet which forms an obtuse angle (e) with the base sheet on one side of the separator groove and contacts the first, third side surfaces, or the second and fourth side surfaces; And a second side sheet forming an acute angle (f) with the base sheet on the other side of the separator groove and contacting the second and fourth side surfaces or the first and third side surfaces.

Specific details of other embodiments are included in the detailed description and the drawings.

The cutting insert according to the present invention made as described above can realize two kinds of picklings by forming separator grooves on both sides of the cutting insert and forming pickling sides on both sides of the separator groove, in particular, the cutting insert is sintered. In addition to fabrication, it may be possible to manufacture by cutting, thereby reducing the manufacturing cost of the cutting insert.

In addition, the cutting insert according to the present invention can more precisely provide pickling by processing the pickling by cutting, and thus more precise cutting can be achieved when cutting the cut.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

Like reference numerals refer to like elements throughout.

Hereinafter, a cutting insert according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 and 2 are a perspective view illustrating a cutting insert according to an embodiment of the present invention and an example showing a state in which the cutting insert according to an embodiment of the present invention and an inverted view of the cutting insert shown in the rear direction. Figure 3 is an exemplary view showing a plan view and a side view of the cutting insert according to an embodiment of the present invention, Figure 4 is a cross-sectional view taken along the line AA of Figure 3 and the line BB of FIG.

1 to 4, the cutting insert 10 according to the exemplary embodiment of the present invention has a fastening hole 20 in a direction in which the upper surface 12 and the lower surface 14 are parallel and orthogonal to the upper surface 12. ) Is formed, and first and second separator grooves 16 and 18 are formed on both sides of the upper surface 12 and the lower surface 14, respectively.

Further, first and second curved surfaces 22 and 24 are formed on both sides perpendicular to the first and second separator grooves 16 and 18 described above.

One side of the above-mentioned first curved surface 22 can make a tangent to the above-mentioned upper surface 12 when the side surface with respect to the above-mentioned 1st, 2nd separator groove 16 and 18 is made, and the above-mentioned 2nd curved surface One side of 22 may be tangent to the lower surface 14 described above when the side surface of the first and second separator grooves 16 and 18 is set to the side.

In addition, the first curved surface 22 and the second curved surface 24 described above may be formed in point symmetry when the first curved surface 22 and the second curved surface 24 are lateral to the aforementioned first and second separator grooves 16 and 18.

In the cutting insert 10 described above, first and third side surfaces 32 and 36 are formed on both sides of the first separator groove 16, and the second separator groove 18 is described above. On the basis of the second and fourth sides 34, 38 are formed on each side.

The above-described first, second, third, and fourth side surfaces 32, 34, 36, 38 may be formed to be inclined at a predetermined angle, wherein the first side surface 32 and the third side surface 34 ) May be inclined in opposite directions, and the second side 34 and the fourth side 36 may be inclined in opposite directions.

As described above, as the first, second, third, and fourth side surfaces 32, 34, 36, and 38 are formed to be inclined, the first side surface 32 and the upper surface 12 are in contact with each other. A linear pickle 42 is formed, and a first curvature pickle 52 is formed at an edge where the first curved surface 22 and the first side surface 32 are in contact, wherein the first linear pickle 42 and the first curvature are formed. Pickles 52 may be formed in one continuous pickling is connected tangentially.

Similarly, second linear cutouts 44 and second curvature cutouts 54 are formed at edges where the second side surface 34, the upper surface 12, and the first curved surface 22 contact each other.

Similarly, third linear cutouts 46 and third curvature cutouts 56 are formed at edges where the third side face 36, the lower surface 14, and the second curved surface 24 contact each other. Fourth linear cutouts 48 and fourth curvature cutouts 58 are formed at the corners at which the four sides 38 and the lower surface 14 and the second curved surface 24 contact each other.

On the other hand, the first linear pickle 42 described above may be parallel to the second, third, third linear pickles 44, 46, 48.

3 and 4, the above-described first side surface 32 and the second side surface 34 may be symmetrical with respect to the first axis Oa, and the third side surface 36 and the third side surface 34 may be symmetrically formed. The four sides 38 may be symmetrical with respect to the second axis Ob.

In addition, an angle formed by the upper surface 12 and the first side surface 32 or the second side surface 34 is an acute angle (a), and the lower surface 14 and the third side surface 36 or the fourth side surface 38 are formed. The angle may be an acute angle c.

The acute angles (a) and (c) described above may be 70 ° to 85 °, wherein the acute angles (a) and (c) are formed in a range of 70 ° to 85 ° so that the first, second, third, fourth linear The optimum cutting angles of the pickles 42, 44, 46, 48 can be realized, thereby inducing chip evacuation, proper cutting amount and optimization of cutting resistance, and the like.

The operation of the cutting insert 10 according to an embodiment of the present invention configured as described above will be described with reference to FIGS. 5 to 7.

5 and 6 are a perspective view and a plan view for explaining an example in which a cutting insert is installed in the cutter according to an embodiment of the present invention, Figure 7 is a cross-sectional view taken along line CC of FIG. DD line sectional drawing of a.

5 and 6, the cutting insert 10 according to an embodiment of the present invention is disposed on the outer circumference of both sides (100a) (100b) of the cutter 100 is fixed using a bolt 140 Can be installed.

As shown in FIG. 7, a sheet for seating the cutting insert 10 is formed in the cutter 100 as described above, and the sheet has first and second side surfaces which form a side surface with the base sheet 110 which forms a bottom surface. Sheets 122 and 124 are provided, and the first side sheet 122 and the second side sheet 124 are separated by the separator groove 120 to form the first side sheet 122 and the second side sheet 124. The inclination direction of the surface of) may be different.

More specifically, the angle formed by the base sheet 110 and the first side sheet 122 may be an obtuse angle (e), and the angle formed by the base sheet 110 and the second side sheet 124 may be an acute angle ( f).

In addition, the angle formed by the base sheet 110 and the first side sheet 122 may be the same as the angle formed by the lower surface 14 and the second side surface 34 of the cutting insert 10. An angle between the 110 and the second side sheet 124 may be the same as the angle between the lower surface 14 and the fourth side 38 of the cutting insert 10.

In addition, as shown in FIG. 6, the cutting process is performed while the cutter 100 rotates in a counterclockwise direction, wherein the cutting insert 10 provided on either side surface 100a of the cutter 100 is a first linear cut ( The cutting is performed by 42 and the first curvature cut 52 or the third linear cut 46 and the third curvature cut 56.

On the other hand, the cutting insert 10 provided on the other side 100b of the cutter 100 has the second linear cut 44 and the second curved cut 54 or the fourth linear cut 48 and the fourth curvature. Cutting is performed by pickling 58.

That is, when the life spans of the first and second linear cuts 42 and 44 and the first and second curvature cuts 52 and 54 expire, the cutting insert 10 can be mounted upside down and the cutting insert ( When 10) is reversed, the cutting process is performed using the third and fourth linear cuts 46 and 48 and the third and fourth curvature cuts 56 and 58.

In addition, a stress may be applied to the cutting insert 10 during the cutting process, and such stress may be applied to the cutting insert 10 in a direction in which the cutting insert 10 is separated from the cutter 100. The insert 10 is disposed such that the fourth side 38 is in contact with the second side sheet 124 of the base sheet 110, and the base sheet 110 and the second side sheet 124 are at an acute angle f. The cutting insert 10 is more firmly fixed so as not to be separated from the cutter 100.

As described above, the cutting insert 10 according to the embodiment of the present invention forms the first and second separator grooves 16 and 18 on both sides of the cutting insert 10, and the separator groove 16. Two kinds of picklings can be realized by forming two types of sides on each side of 18), and in particular, cutting inserts can be manufactured by cutting processing in addition to sintering, thereby lowering the manufacturing cost of cutting inserts. will be.

In addition, the cutting insert 10 according to an embodiment of the present invention may provide a more precise pickling by processing the pickling by the cutting process, whereby a more precise cutting process can be made when cutting.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is represented by the following detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

The cutting insert according to the embodiment of the present invention may be installed in the cutter and used to cut the gear.

1 and 2 are a perspective view illustrating a cutting insert according to an embodiment of the present invention and an exemplary view showing a state in which the cutting insert according to an embodiment of the present invention is shown in an upside down view. .

3 is an exemplary view showing a plan view and a side view of a cutting insert according to an embodiment of the present invention.

4 is a cross-sectional view taken along the line A-A of FIG. 3 and a cross-sectional view taken along the line B-B of FIG.

5 and 6 are a perspective view and a plan view for explaining an example in which the cutting insert is installed in the cutter according to an embodiment of the present invention.

7 is a cross-sectional view taken along the line C-C of FIG. 6 and a cross-sectional view taken along the line D-D of FIG.

(Explanation of symbols for the main parts of the drawing)

10: cutting insert 12: upper surface

14: 16, 18: first and second separator groove

20: fastening holes 22, 24: first and second curved surfaces

32, 34, 36, 38: first, second, third, fourth side

42, 44, 46, 48: 1st, 2nd, 3rd, 4th linear pickling

52, 54, 56, 58: first, second, third, fourth curvature pickled

O: axis Oa, Ob: first and second axis

100: cutter 110: base sheet

122 and 124: first and second side sheets 140: bolts

Claims (4)

A fastening hole 20 having an axis O perpendicular to the upper surface 12 and the lower surface 14; First and second separator grooves (16, 18) formed on both side surfaces of the upper surface (12) and the lower surface (14), respectively; A first curved surface 22 tangential to the upper surface 12 and formed at a position orthogonal to the first and second separator grooves 16 and 18; A second curved surface 24 formed in a position tangent to the lower surface 14 and orthogonal to the first and second separator grooves 16 and 18; A first side surface 32 having an acute angle with the upper surface 12 on one side of the first separator groove 16 to form a first linear cut 42 and a first curvature cut 52 at a corner thereof; A second side face 34 formed with an acute angle with the upper surface 12 on one side of the second separator groove 18 to form a second linear cut 44 and a second curvature cut 54 at a corner thereof; A third side surface 36 having an acute angle with the lower surface 14 on one side of the first separator groove 16 to form a third linear cut 46 and a third curvature cut 56 at an edge thereof; And A fourth side face 38 having an acute angle with the lower face 14 on one side of the second separator groove 18 to form a fourth linear cut 48 and a fourth curvature cut 58 at an edge thereof; Cutting insert comprising a. The method of claim 1, All the acute angle is a cutting insert, characterized in that 70 ° to 85 °. The method of claim 1, And the first linear cut (42), the second linear cut (44), the third linear cut (46), and the fourth linear cut (48) are parallel. A base sheet 110 in contact with the upper surface 12 or the lower surface 14 according to claim 1; A separator groove 120 formed concave on the side of the base sheet 110; One side of the separator groove 120 forms an obtuse angle e with the base sheet 110, and the first and third side surfaces 32 and 36 or the second and fourth side surfaces 34 and 38 are formed. A first side sheet 122 in contact; And The second and fourth side surfaces 34 and 38 or the first and third side surfaces 32 and 36 form an acute angle f with the base sheet 110 on the other side of the separator groove 120. Contacting second side sheets 124; Cutter with a cutting insert comprising a.

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